AM-64 assault rifle)

AM-64
Type	Assault rifle
Place of origin	Astronea
Service history
In service	1974-2008
Used by	Astronean Armed Forces
Production history
Designed	1971-1973
Manufacturer	ACC Defence Division
Unit cost	$500
Produced	1973-1998
Variants	AM-85, AM-98 ISW
Specifications
Length	950 mm (37 in)
Barrel length	418 mm (16.5 in)
Cartridge	5.56x45mm, 5.45x39mm, 7.62x39mm
Action	Gas-operated, rotating bolt
Rate of fire	700 rounds/min
Muzzle velocity	715 m/s (2,350 ft/s)
Effective firing range	300 m (330 yd)
Maximum firing range	500
Feed system	30 round detachable box magazine
Sights	Fixed, adjustable iron sights
References

The AM-64 is a gas-operated assault rifle of Astronean origin. The weapon was designed to be highly reliable and sufficiently accurate, cheap to manufacture, easy to train with and simply to maintain. The rifle was designed in 1973, and was accepted into service by the Astronean Armed Forces a year later. The initial AM-64 variant was updated and replaced by the improved AM-85 variant in 1985, and the AM-98 variant in 1998. Astronea maintains large surplus stocks of the rifle, and frequently sells batches for export with various aftermarket configurations. One of the main advantages to potential buyers is its caliber interchangeability. The AM-64 can be chambered for both the 5.56x45 and 5.45x39 cartridge, as well as the heavier 7.62x39 and 7.62x51 rounds. The rifle uses a stamped receiver and polymer parts to increase general accuracy and reduce weight.

The namesake for the AM-64 comes from pre-1980 Astronean weapons designation. The Defence Directorate would frequently assign model designations with date figures over a decade out of date, in order to hide the level of advancement of the AAF's equipment.

Design

Beginning with a licensed version of the AK-47 receiver, the AM-64 is an upgrade of the rifle at every point. Tolerances are tighter than the AK designs while still being generous enough to assure reliability in all climates. The gas piston included small “fingers” near the piston to ensure smoother functioning inside the gas tube, which helped to increase the inherent accuracy of the rifle. Another move toward increased accuracy was the upgraded sights.

The front sight is mounted on the gas block which makes for one less attachment to the barrel, adding to the mechanical accuracy. The front sight is fully adjustable in the field by the soldier. There is also a flip up tritium night sight that covers the front post for low light shooting.

The rear sight is an aperture on a sliding tangent affair adjustable to 600 meters and a “battle sight” setting of 150 meters. The rear sight is located toward the rear of the top cover. The rear sight also has tritium inserts for night shooting by flipping the sight all the way forward (upside down). Once in this position, there is a square notch arrangement with two tritium dots on either side. In this position, the rear sight is adjustable for elevation via a set screw under the sight arm.

Another feature of the AM-64 series rifles is the flash suppressor. It resembles an enlarged version of the suppressor on the original M16. Directly under the flash suppressor is a bayonet lug to accommodate the knife-style bayonet. The flash suppressor has some sharp edges along its longitudinal cuts for wire cutting. A soldier slides the barbed wire into the flash suppressor and simply rotates his rifle around until it snaps the small gauge wire. For thicker wire, the soldier inserts the wire, gives a half turn and fires the rifle, which will snap the wire. On the M16 the prong type flash suppressor was abandoned for the bird cage type because the prongs tended to snag on vegetation in the field. While this is still a problem with the AM-64, the sharper edges help to cut through some of the vegetation.

There are both solid and folding stock versions. Folding stock designs may become troublesome in that eventually they tend to become loose. This is not a problem with the AM-64 series of rifles as the hinge and lock design are very robust. Both feature a trap door in the butt to store a cleaning kit. So as not to freeze a soldier’s face in freezing temperatures, there is a thin plastic sleeve over the tube section of the stock that typically contacts the shooter's face.

Variants

AM-85

AM-85
AM-85 variant

In 1985, fifteen years after the AM-64 entered service, a full body stock version of the AM series entered service with the Astronean Rifles, which used more polymer and featured a more modern handguard to replace the rubber version, improving erganomics.

AMW-98 ISW

AM-98 ISW
AM-98 ISW improved service weapon variant

Up until 2008, the AM family had been the primary service rifle of Astronean forces, most notable the prestigious Astronean Rifles and Saighead Regiment. The AM-98 is a direct upgrade to bring the rifle up to modern standards. The initial AM-98 model features many external and internal upgrades, including a new folding stock, improved iron sights, angled charging handle, more liberal use of polymer, improved fire selector and a more effective flash hider. However since the early 2000s, Talamnrath Precision Systems has been working on an upgrade to improve integration of optics and electronics onto the weapon. Previously, an external rail was added to provide options for mounting sights and other peripherals.

The newest upgrade, the Improved Service Weapon (ISW), features a fully integral RIS, more modern stock, options for underslung attachments, new pistol grip and trigger mechanism. This all round modernization was a welcome addition to the Astronean Armed Forces as it allowed soldiers to use a familiar weapon platform in a modern configuration, using magnified sights and IR laser sights in main forces. The AM-98 has been mostly replaced by the newer AMW-280, however large quantities remain in Astronean inventory and for export.

The Improved Service Weapon (ISW), features a fully integral RIS, more modern stock, options for under-slung attachments, new pistol grip and trigger mechanism. This all round modernization was a welcome addition to the Astronean Armed Forces as it allowed soldiers to use a familiar weapon platform in a modern configuration, using magnified sights and IR laser sights in main forces. Like its predecessor, the AM-96 is able to be chambered in numerous 5.56/45 and 7.62 calibers. However, another revolutionary upgrade of the rifle is its ability to change calibers by swapping out barrels, a technology also implemented on the TPS R-30 marksman rifle.