BR-55 Assault Rifle: Difference between revisions

Jump to navigation Jump to search
(Created page with "{{infobox weapon | name = BR-055 Assault Rifle | image = 300px | caption = Top to bottom:<br>BR-055 Rifle<br...")
 
No edit summary
Line 1: Line 1:
{{infobox weapon
{{infobox weapon
| name              = BR-055 Assault Rifle
| name              = BR-55 Assault Rifle
| image              = [[File:R85_rifle_drawn.png|300px]]
| image              = [[File:The M16A4 Series 5.56mm Rifle.jpg|300px]]<br>
| caption            = Top to bottom:<br>BR-055 Rifle<br>BR-055C Carbine<br>BR-055LSW LSW<br>BR-055CS Ultrashort
[[File:M4A1 ACOG.jpg|300px]]
| caption            = Top to bottom<br>BR-55A3 Assault Rifle, produced 1997<br>BR-55C, produced 1993
| origin            = {{flag|Belfras}}
| origin            = {{flag|Belfras}}
| type              =  
| type              =  
Line 14: Line 15:
| is_UK              =  
| is_UK              =  
<!-- Service history -->
<!-- Service history -->
| service            = 1985 - present
| service            = 1963 - present
| used_by            =  
| used_by            = See ''[[#users|Users]]''
| wars              =  
| wars              =  
<!-- Production history -->
<!-- Production history -->
| designer          =  
| designer          =  
| design_date        = 1984
| design_date        = 1958
| manufacturer      = Royal Arsenal
| manufacturer      = Naxos Arsenal
| unit_cost          =  
| unit_cost          =  
| production_date    = 1985-present
| production_date    = 1961-present
| number            =  
| number            =  
| variants          = See ''[[#Variants|Variants]]''
| variants          = See ''[[#Variants|Variants]]''
<!-- General specifications -->
<!-- General specifications -->
| spec_label        =  
| spec_label        =  
| weight            = 3.3kg (BR-055), 3.1 kg (BR-055C), 3.8 kg (BR-055M), 4.2 kg (BR-055LSW), 2.8 kg (BR-055CS)
| weight            = 3.40 kg (7.5 lb)
| length            =  
| length            = 1 meter (39.5 in)
| part_length        =  
| part_length        = 0.5 meter (20 in)
| width              =  
| width              =  
| height            =  
| height            =  
Line 36: Line 37:
| passengers        =
| passengers        =
<!-- Ranged weapon specifications -->  
<!-- Ranged weapon specifications -->  
| cartridge          = 5.56 x 45<br>6.5 Grendel<br>6.8 SPC<br>5.45x39<br>9 x 19 Para<br>6.5 x 25 CBJ<br>.300AAC Blackout<br>.50 Beowulf<br>[[7.72x54mm TE|7.72x54 Tarsan]]
| cartridge          =  
| cartridge_weight  =  
| cartridge_weight  =  
| caliber            =  
| caliber            = 5.56×45mm NS (Primary BR-55)<br>(Variants vary)
| barrels            = 29.2 cm (11.5' in)<br>36.8 cm (14.5' in)<br>40.6 cm (16.0' in)<br>45.7 cm (18' in)<br>50.8 cm (20' in)
| barrels            =
| action            = Direct impingement gas operated, rotating bolt
| action            = Gas-operated, rotating bolt<br>(direct impingement)
| rate              = 700-950 RPM
| rate              = 700-950 rpm max sustained<br>50-60 rpm semi-automatic
| velocity          =  
| velocity          =  
| range              = 400-800m
| range              =  
| max_range          =  
| max_range          =  
| feed              = 30 rounds box magazine, 60 rounds casket magazine, 100 rounds dual-drums magazine
| feed              =  
| sights            = Iron Sights, optics compatible with picatinny rail
| sights            = Iron sights or various optics
<!-- Artillery specifications -->
| breech            =
| recoil            =
| carriage          =
| elevation          =
| traverse          =
<!-- Bladed weapon specifications -->
| blade_type        =
| hilt_type          =
| sheath_type        =
| head_type          =
| haft_type          =
<!-- Explosive specifications -->
| filling            =
| filling_weight    =
| detonation        =
| yield              =
<!-- Vehicle/missile specifications -->
| armour            =
| primary_armament    =
| secondary_armament  =
| engine            =
| engine_power      =
| pw_ratio          =
| transmission      =
| payload_capacity  =
| suspension        =
| clearance          =
| fuel_capacity      =
| vehicle_range      =
| speed              =
| guidance          =
| steering          = 
<!-- Missiles only -->
| wingspan          =
| propellant        =
| ceiling            =
| altitude          =
| depth              =
| boost              =
| accuracy          =
| launch_platform    =
| transport          =
}}
}}


The '''BR-055''' family was designed and placed into service to replace the [[Estovnia|Estovnian]] [[Ag 3]], or BR-025D, as the Army's primary service weapon.
The '''BR-55 Assault Rifle''' is a [[Belfras|Belfrasian]]-designed family of weapons designed to be used as the standard service weapon of the [[Belfrasian Armed Forces|Belfrasian military]]. It replaced the [[BR-28 Battle Rifle]] as the military's primary service rifle after only five years of service, with military officials being unhappy with it's performance and the eager to keep up with rapidly accelerating technological advances.


==Development==
The first rifles produced by Naxos arsenal for the BR-55 series fired the 5.56×45mm round in an easily removed 20-round magazine. The weapon's first usage was in the 1965-1970 [[Terror Bird Wars]], a military action against an invasive tall-bird species that threatened to wipe out local farm-animal life and had previously managed to kill several farmers after their nests were disturbed in the late 1920s. Toward the end of the Terror Bird Wars in 1968 the older BR-28, which remained a popular weapon of choice for it's better stopping power against the large birds, was completely replaced as the primary service weapon for the Belfrasian forces.
[[File:Danish AR M95.png|thumb|left|300px|BR-055 rifle from the early-90s]]


Realising that the heavy and cumbersome [[Ag 3]] was fundamentally unsuitable for mechanised infantry, the Ministry of Defence began to look for a replacement in the 1980s. The BR-055 entry was, in essence, it was a localised version of the Emmerian AR-15, albeit featuring improvements such as cold hammer forged barrel, ambidextrous trigger group and magazine release and, most importantly, the replacement of the fixed carry handle with a detachable substitute attached with a strip of Weaver Rail, which can also be used for optics. Emmerian aluminium magazines were rejected for being overly flimsy in the variety of conditions the Army operated at the time and replaced with a locally-manufactured steel magazine. The magazine catch and feeding mechanisms were also reinforced to improve reliability, with the side-effect of allowing the troops to routinely tape their 30-rounds steel magazines together for rapid reloading without adversely affecting feed reliability.
Improvements to the weapon came in whole-model variant upgrades, the first being the BR-55A1 in 1973 which included corrective systems for faults as well as other improvements made from lessons learned during both the Terror Bird Wars and other foreign engagements conducted both by the Belfrasians and by foreign operators. Another upgrade, dubbed the BR-55A2, was released over a period of two years from 1984 to 1986 and was the first weapon to utilise the 1980-designed NASTAG (Naxos Standard) magazine for it's now standardised ammunition, which had been refitted into the older rifles. The variant showed significant improvements over it's predecessor and became a highly exported weapon since it's creation. In 1997 the BR-55A3 was first produced, featuring a revamped design once again that allowed for an incredibly high level of customisation and has become the military's primary usage of the BR-55 series.


==The 2003 upgrade==
In 1965 the military began to experiment with a shortened version of the BR-55 for usage with special forces and tank personnel. The first weapon designed to suit this requirement, coined the XR-55CAR, was produced two years later in 1967. In-field tests of the weapon proved that it worked on the existing BR-55's receiver system well, although accuracy as hindered by the shortened size and reduced ammo capacity. Improvements to the XR-55CAR, the XR-55CAR/A1 released in 1972, allowed it to carry a 30-round magazine and a standardised load-carrying attachment system meant it was easily carried by special forces personnel or tank crews while on deployment. The weapon was the first produced by Naxos to feature a fully retractable stock, a concept that later featured in the XR-55CAR's follow-on series.


By 2003, the old rifle’s deficiencies were becoming increasingly apparent. The Royal Arsenal created an updated design featuring the following improvements:
Eventually in 1991 chief Naxos arsenals designer Marcellus Panaetius presented the completely redesigned XR-55CAR, calling it the 'BR-55C', for carbine. The BR-55C followed a lot of design influences learned from the XR-55CAR, but had a longer barrel  of 14.5 inches as opposed to the 10-inch barrel of the XR-55CAR, of which half was a non-replaceable flash hider. The BR-55C featured a picatinny rail on the grip and receiver of the weapon as standard and had a collapsable rear iron sight, but static front ironsight that could be used to help align an attached scope.


* The rifle can now be converted to use the 5.45x39, 6.5 Grendel, 6.8 SPC and other popular rounds on the international market. New bolt group and recoil springs were issued to handle the more powerful new cartridges.
While the BR-55C has a significantly reduced size and weight, it shares an 80% parts commonality with the BR-55 as well as an identical receiver system that utilises the same magazine types and ammunition, known as the Naxos Standard (or NS). Accuracy with the BR-55C is worse than that of the BR-55 which has a 5.5 inch longer barrel, although such inconsistencies only become apparent at ranges exceeding 180 meters (200 yards).


* A new integrated upper receiver rail(IUR) for more flexibility when installing accessories
== Design ==


* Two new magazines types: a heavy stamped steel version and a polymer version with a transparent window, both with strengthened springs for more reliable feeding in adverse maintenance conditions.
The BR-55 Assault Rifle was designed as a lightweight magazine-fed assault rifle that had a reliable rotating bolt system that could reliably fire in fully automatic or semi-automatic firing modes on the fly in order to replace the BR-28 Battle Rifle, which while it would possess a larger cartridge size, had issues with it's grip posture and weight: When fully loaded with it's 20-round magazine, the BR-28 came in at 4.4 kg (9.70 lb). The BR-55A1 on the other hand, with a 30-round magazine weighed 3.6 kg (7.9 lb) The BR-55A2 weighs around 4.0 kg (8.8 lb) when loaded with it's 30-round magazine, the added weight being due to a thicker barrel profile that drastically reduces heat damage when under sustained fire and prevents damage when handled roughly - A complaint of earlier rifles was barrel distortion if heavy pressure as applied to one side.


* The introduction of a more ergonomic pistol grip, covered with a slip-proof coating of rubber.
Early models of the BR-55 featured a rifling inside the barrel that would cause the bullet to spin, stabilising it in flight and drastically improving accuracy at longer ranges. When the 1980's Naxos Standard (NS) came into effect the rifling was changed to accommodate the heavier, but more reliable, bullet design. The BR-55A2's thicker barrel modification only exists outside of the weapon's handguard, as inside the casing it does not require environmental protection.  


* In place of the original's chrome-lining, the barrel, piston and chamber of the rifle are now treated with ferritic nitrocarburizing. This is a superior process which prolongs their service life even further.
The sights of the weapon were designed purposefully to present a similar image to users so that personnel when first equipped with the rifle over the previous BR-28 or BR-10 had the comfort of knowing that the sights of the weapon operated identically to those on their previous rifles, and during the early stages of it's service, when the BR-28 and BR-10 was still utilised in some areas, any changes of the weapon did not mean the operator had to get used to a new sight profile. The sights themselves utilise a low-light system which has the front sight post sport a weak light source provided by {{wpl|Tritium}}, a radioactive isotope of hydrogen. The front sight post are static on the weapon and could be adjusted through the use of a tool-operated dial to create the operators set point.


* The Arthuristan [[K4 Bayonet]] replaced the old {{wp|M7 Bayonet|M7}} style blade. Compared to its predecessor, it is heavier, more substantial and optimised for piercing modern body armour in close combat.
The rear sights of the weapon, initially an aperture within the weapon's distinctive carry handle and has two sights that could be flipped between that allows for sightings in the ranges of 0-300 meters or 300-400+ meters. The setting of both sights could be done through a dial on the side of the handle and, if needed, locked through a tiny switch just above the dial. When newer versions came into use with picatinny rails replacing the built-on carry handle, the front sight remained to usage with a back-up iron sight system which rested lower than the carry handle aperture but was meant for usage if the new attachable combat optics failed.


* The replacement of the old {{wp|C79 optical sight}}, which had issues retaining zero due to its use of external adjustment mechanisms, with a combination of the {{wp|Aimpoint CompM4}} red dot sight and a flip-mounted 3x magnifier.  
The BR-55 has always been considered a highly accurate rifle, with it's design permitting light recoil, high velocity and a flat trajectory of rounds which allow operators on target practice fields to reliably take headshots at around 300 meters. Tests of the Naxos Standard munitions indicated they had a significantly better flight profile which allowed a reliable hit picture out to 600 meters in range and staying within an 8 inch perimeter.


Other optional extras include the AN/PEQ-15 laser pointer, night sight and underbarrel grenade launcher. Any other picatinny-compatible accessory may be mounted.
The BR-55 and it's variants were designed to be able to modified for usage with a high number of systems, although the BR-55A1 and A2 had to have their handguards replaced to fit them, making them semi-permanent attachments. The later BR-55A3 and the BR-55C, with their picatinny rails, were able to attach and unattach just modifications much easier through the use of screws and a small hex key. Such modifications possible include the under-barrel 40mm grenade-launchers, an under-barrel 12-gauge shotgun, or pistol grips for better control of the weapon.


==Variants==
The barrel of the weapon is designed to additionally be used in a variety of ways, with clip-attachment points allowing for the quick attachment of a bayonet, a hand-tightening support for a native bipod (since obsolete with picatinny), and GAIUS-type rifle grenades. The GAIUS rifle grenades are designed for usage with 5.56mm rifles, such as the BR-55, and slide over the barrel and propelled by the weapon firing a standard ball or tracer rounds out to ranges of around 30 meters and detonated by impact when the standoff rod is rapidly depressed in to the trigger. The rifle grenade delivered a 120 or 150 gram explosive package and, while designed for usage with breaching through doors, has found use in destroying non-hard cover or disabling a vehicle.


Aside from the basic rifle, the R85 family also features the following variants:
=== Carbine ===


The '''BR-055LSW''' has a 50.8cm heavy barrel, full length handguard and can be fed from 100-rounds drum magazines or standard box magazines. Its barrel can be changed out in three seconds by a skilled operator. It fires from a closed-bolt in semi-automatic mode, or in the first round of a burst, and open bolt in full automatic mode.
== Variants ==


The '''BR-055M''' variant is fitted with a 50.8cm match-grade heavy barrel and trigger, full length handguard and 6 x optics with secondary red dot sight
=== BR-55 ===


The '''BR-055C''' has a 40cm barrel and shortened handguard. It is widely issued to both front and rear personnel as a substitute service long arm when the longer barrel of the Standard is deemed inconvenient.  
;'''BR-55/S''': The BR-55/S is the first produced model of the weapon, with the /S missing from all except documentation separating the variants, with the /S standing for 'Standard', the Naxos titling to indicate the design was ready to go into production. It was in use for ten years until the conception of the BR-55A1, which replaced the weapon completely.
[[File:Sam16a1.jpg|thumb|right|150px|BR-55A1, 1973]]
;'''BR-55A1''': The BR-55A1 improved over the original model in 1973 with the inclusion of a 'forward assist' that allowed the user to manually push the bolt forward if the return spring has or could not done so. The weapon features an improved 30-round magazine size that in 1980 was modified to allow for the new Naxos Standards to apply. It also features an improved magazine feed system that had a brushed edge to push any potential foreign objects in the magazine away from the chamber as it loaded a round.
[[File:M16A2 rightside noBG.jpg|thumb|right|150px|BR-55A2, 1984]]
;'''BR-55A2''': Sometimes known as the new-look upgrade, the A2 variant was introduced over a two-year period from 1984 to 1986 and became the first of the variants to utilise the NASTAG (Naxos Standard Magazine) which had been introduced in 1980, with the A1 retrofitted to fit it. Other additions made by the A2 were highly extensive, earning the 'new look' nickname it received. New rifling for the Naxos Standard upgrades was introduced, a thicker barrel in front of the front sight post helped avoid battle damage or warping from overheating, a new design handguard and other significant reliability  upgrades were also made.
[[File:M16 con lanza granadas.jpg|thumb|right|150px|BR-55A3, 1997]]
;'''BR-55A3''': Introduced in 1997, the BR-55A3 is a whole-body picatinny rail system that runs down the handguard and receiver system and can be equipped with the iconic carry handle as an accessory or instead utilise a dedicated optic device with a back-up iron-sight system installed instead. The highly modular variant has quickly become the most commonly used variant in the military and can be modified to accommodate a wide variety of tools, optics, or other items the operator wishes.


The '''BR-055CS''', fitted with a 29.2cm barrel, is commonly issued to vehicle crews, as well as select commando and police tactical units.
=== BR-55C ===


The '''BR-055S''' is a submachine gun variant with a 29.2cm barrel, currently chambered in 9 x 19, 6.5 x 25 CBJ and .40 S&W. A 10mm auto version will be introduced in the near future.
=== BR-55M ===


==Belfrasian 5.56x45 catridges==
==Users==


* Mark 6A: Standard issue armour-piercing ball round. Features a sharpened core of hardened (60HRC) steel fronted by a lead plug seated behind an air cavity.
* Mark 6B: Enhanced AP round with a tungsten carbide core fronted by a lead plug and air cavity
* Mark 6C: High explosive incendiary armour piercing (HEIAP)
* Mark 6D: Jacketed hollow point (not for general issue in conventional warfare scenarios)
* Mark 6E: Tracer (green)
* Mark 6F: Tracer (red)
* Mark 6G: Match-grade round for marksman rifles, hardened steel core AP round
* Mark 6H: Match-grade round, tungsten carbide core
* Mark 6I: Subsonic round, lead core
* Mark 6J: Subsonic round, tungsten carbide core
==Users==
* {{flag|Belfras}}
* {{flag|Belfras}}



Revision as of 20:58, 16 July 2019

BR-55 Assault Rifle
The M16A4 Series 5.56mm Rifle.jpg
M4A1 ACOG.jpg
Top to bottom
BR-55A3 Assault Rifle, produced 1997
BR-55C, produced 1993
Place of origin Belfras
Service history
In service1963 - present
Used bySee Users
Production history
Designed1958
ManufacturerNaxos Arsenal
Produced1961-present
VariantsSee Variants
Specifications
Weight3.40 kg (7.5 lb)
Length1 meter (39.5 in)
Barrel length0.5 meter (20 in)

Caliber5.56×45mm NS (Primary BR-55)
(Variants vary)
ActionGas-operated, rotating bolt
(direct impingement)
Rate of fire700-950 rpm max sustained
50-60 rpm semi-automatic
SightsIron sights or various optics

The BR-55 Assault Rifle is a Belfrasian-designed family of weapons designed to be used as the standard service weapon of the Belfrasian military. It replaced the BR-28 Battle Rifle as the military's primary service rifle after only five years of service, with military officials being unhappy with it's performance and the eager to keep up with rapidly accelerating technological advances.

The first rifles produced by Naxos arsenal for the BR-55 series fired the 5.56×45mm round in an easily removed 20-round magazine. The weapon's first usage was in the 1965-1970 Terror Bird Wars, a military action against an invasive tall-bird species that threatened to wipe out local farm-animal life and had previously managed to kill several farmers after their nests were disturbed in the late 1920s. Toward the end of the Terror Bird Wars in 1968 the older BR-28, which remained a popular weapon of choice for it's better stopping power against the large birds, was completely replaced as the primary service weapon for the Belfrasian forces.

Improvements to the weapon came in whole-model variant upgrades, the first being the BR-55A1 in 1973 which included corrective systems for faults as well as other improvements made from lessons learned during both the Terror Bird Wars and other foreign engagements conducted both by the Belfrasians and by foreign operators. Another upgrade, dubbed the BR-55A2, was released over a period of two years from 1984 to 1986 and was the first weapon to utilise the 1980-designed NASTAG (Naxos Standard) magazine for it's now standardised ammunition, which had been refitted into the older rifles. The variant showed significant improvements over it's predecessor and became a highly exported weapon since it's creation. In 1997 the BR-55A3 was first produced, featuring a revamped design once again that allowed for an incredibly high level of customisation and has become the military's primary usage of the BR-55 series.

In 1965 the military began to experiment with a shortened version of the BR-55 for usage with special forces and tank personnel. The first weapon designed to suit this requirement, coined the XR-55CAR, was produced two years later in 1967. In-field tests of the weapon proved that it worked on the existing BR-55's receiver system well, although accuracy as hindered by the shortened size and reduced ammo capacity. Improvements to the XR-55CAR, the XR-55CAR/A1 released in 1972, allowed it to carry a 30-round magazine and a standardised load-carrying attachment system meant it was easily carried by special forces personnel or tank crews while on deployment. The weapon was the first produced by Naxos to feature a fully retractable stock, a concept that later featured in the XR-55CAR's follow-on series.

Eventually in 1991 chief Naxos arsenals designer Marcellus Panaetius presented the completely redesigned XR-55CAR, calling it the 'BR-55C', for carbine. The BR-55C followed a lot of design influences learned from the XR-55CAR, but had a longer barrel of 14.5 inches as opposed to the 10-inch barrel of the XR-55CAR, of which half was a non-replaceable flash hider. The BR-55C featured a picatinny rail on the grip and receiver of the weapon as standard and had a collapsable rear iron sight, but static front ironsight that could be used to help align an attached scope.

While the BR-55C has a significantly reduced size and weight, it shares an 80% parts commonality with the BR-55 as well as an identical receiver system that utilises the same magazine types and ammunition, known as the Naxos Standard (or NS). Accuracy with the BR-55C is worse than that of the BR-55 which has a 5.5 inch longer barrel, although such inconsistencies only become apparent at ranges exceeding 180 meters (200 yards).

Design

The BR-55 Assault Rifle was designed as a lightweight magazine-fed assault rifle that had a reliable rotating bolt system that could reliably fire in fully automatic or semi-automatic firing modes on the fly in order to replace the BR-28 Battle Rifle, which while it would possess a larger cartridge size, had issues with it's grip posture and weight: When fully loaded with it's 20-round magazine, the BR-28 came in at 4.4 kg (9.70 lb). The BR-55A1 on the other hand, with a 30-round magazine weighed 3.6 kg (7.9 lb) The BR-55A2 weighs around 4.0 kg (8.8 lb) when loaded with it's 30-round magazine, the added weight being due to a thicker barrel profile that drastically reduces heat damage when under sustained fire and prevents damage when handled roughly - A complaint of earlier rifles was barrel distortion if heavy pressure as applied to one side.

Early models of the BR-55 featured a rifling inside the barrel that would cause the bullet to spin, stabilising it in flight and drastically improving accuracy at longer ranges. When the 1980's Naxos Standard (NS) came into effect the rifling was changed to accommodate the heavier, but more reliable, bullet design. The BR-55A2's thicker barrel modification only exists outside of the weapon's handguard, as inside the casing it does not require environmental protection.

The sights of the weapon were designed purposefully to present a similar image to users so that personnel when first equipped with the rifle over the previous BR-28 or BR-10 had the comfort of knowing that the sights of the weapon operated identically to those on their previous rifles, and during the early stages of it's service, when the BR-28 and BR-10 was still utilised in some areas, any changes of the weapon did not mean the operator had to get used to a new sight profile. The sights themselves utilise a low-light system which has the front sight post sport a weak light source provided by Tritium, a radioactive isotope of hydrogen. The front sight post are static on the weapon and could be adjusted through the use of a tool-operated dial to create the operators set point.

The rear sights of the weapon, initially an aperture within the weapon's distinctive carry handle and has two sights that could be flipped between that allows for sightings in the ranges of 0-300 meters or 300-400+ meters. The setting of both sights could be done through a dial on the side of the handle and, if needed, locked through a tiny switch just above the dial. When newer versions came into use with picatinny rails replacing the built-on carry handle, the front sight remained to usage with a back-up iron sight system which rested lower than the carry handle aperture but was meant for usage if the new attachable combat optics failed.

The BR-55 has always been considered a highly accurate rifle, with it's design permitting light recoil, high velocity and a flat trajectory of rounds which allow operators on target practice fields to reliably take headshots at around 300 meters. Tests of the Naxos Standard munitions indicated they had a significantly better flight profile which allowed a reliable hit picture out to 600 meters in range and staying within an 8 inch perimeter.

The BR-55 and it's variants were designed to be able to modified for usage with a high number of systems, although the BR-55A1 and A2 had to have their handguards replaced to fit them, making them semi-permanent attachments. The later BR-55A3 and the BR-55C, with their picatinny rails, were able to attach and unattach just modifications much easier through the use of screws and a small hex key. Such modifications possible include the under-barrel 40mm grenade-launchers, an under-barrel 12-gauge shotgun, or pistol grips for better control of the weapon.

The barrel of the weapon is designed to additionally be used in a variety of ways, with clip-attachment points allowing for the quick attachment of a bayonet, a hand-tightening support for a native bipod (since obsolete with picatinny), and GAIUS-type rifle grenades. The GAIUS rifle grenades are designed for usage with 5.56mm rifles, such as the BR-55, and slide over the barrel and propelled by the weapon firing a standard ball or tracer rounds out to ranges of around 30 meters and detonated by impact when the standoff rod is rapidly depressed in to the trigger. The rifle grenade delivered a 120 or 150 gram explosive package and, while designed for usage with breaching through doors, has found use in destroying non-hard cover or disabling a vehicle.

Carbine

Variants

BR-55

BR-55/S
The BR-55/S is the first produced model of the weapon, with the /S missing from all except documentation separating the variants, with the /S standing for 'Standard', the Naxos titling to indicate the design was ready to go into production. It was in use for ten years until the conception of the BR-55A1, which replaced the weapon completely.
BR-55A1, 1973
BR-55A1
The BR-55A1 improved over the original model in 1973 with the inclusion of a 'forward assist' that allowed the user to manually push the bolt forward if the return spring has or could not done so. The weapon features an improved 30-round magazine size that in 1980 was modified to allow for the new Naxos Standards to apply. It also features an improved magazine feed system that had a brushed edge to push any potential foreign objects in the magazine away from the chamber as it loaded a round.
BR-55A2, 1984
BR-55A2
Sometimes known as the new-look upgrade, the A2 variant was introduced over a two-year period from 1984 to 1986 and became the first of the variants to utilise the NASTAG (Naxos Standard Magazine) which had been introduced in 1980, with the A1 retrofitted to fit it. Other additions made by the A2 were highly extensive, earning the 'new look' nickname it received. New rifling for the Naxos Standard upgrades was introduced, a thicker barrel in front of the front sight post helped avoid battle damage or warping from overheating, a new design handguard and other significant reliability upgrades were also made.
BR-55A3, 1997
BR-55A3
Introduced in 1997, the BR-55A3 is a whole-body picatinny rail system that runs down the handguard and receiver system and can be equipped with the iconic carry handle as an accessory or instead utilise a dedicated optic device with a back-up iron-sight system installed instead. The highly modular variant has quickly become the most commonly used variant in the military and can be modified to accommodate a wide variety of tools, optics, or other items the operator wishes.

BR-55C

BR-55M

Users