AAR-90

Accelerator Assault Rifle - 90
The AAR-90, chambered in the 6 mm armour-piercing guided bolt.
Type	Assault rifle, service rifle
Place of origin	Terran Concordium
Service history
In service	3229 - present
Used by	Interstellar Federation
Wars	War on Piracy
Production history
Designer	Axiom Defence
Designed	3220-3229
Manufacturer	Axiom Defence United Arms Technologies
Unit cost	5522 IcR
Produced	2595 - present
No. built	Over 500 quadrillion built
Variants	See Variants
Specifications
Weight	3.5 kilograms (7.7 lb)
Length	97 centimetres (38 in)
Cartridge	6 x 60 mm armour-piercing guided bolt
Cartridge weight	10 grams (150 gr)
Caliber	6 millimetres (0.24 in)
Action	Electromagnetic linear accelerator
Rate of fire	Maximum
Muzzle velocity	3,779 metres per second (12,400 ft/s)
Effective firing range	Effective range: 2,300 metres (2,500 yd)
Maximum firing range	6,500 metres (7,100 yd)
Feed system	50 round magazines or 200 round drums
Sights	RAD-5 hologram sight projector

The Accelerator Assault Rifle - 90 is an Concordian designed fully automatic assault rifle that is chambered in the 6 mm x 60 mm armour piercing guided bolt, an intermediate guided rifle round made of a solid depleted uranium flechette. Developed from 3220 and in service from 3229, it has since become the standard Interstellar service rifle of the Valkyries and has proved to be one of the most effective, reliable and rugged firearms ever produced.

Design

A Concordian marine running under fire wielding his AAR-90.

The AAR-90 is chambered in 6 x 30 mm antimatter hydrogen bolt and is a magazine fed full-length automatic assault rifle with select-fire ability. It is operated through an electromagnetic linear accelerator that consists of an array of 90 electromagnets arranged in the form of two parallel rails that propel the ammunition to a muzzle velocity of 3779 m/s or Mach 11. Compared to previous railgun rifles, the AAR-90 is compacts far more electromagnets and uses a more efficient energy delivery system. This allows for the AAR-90 to achieve higher ballistic properties than previous rifles, increasing the damage upon impact, with an estimated muzzle energy of 70 kilojoules and extending the reach of the rifle to up to 2.5 kilometers.

Energy source

The AAR-90, as a railgun rifle, requires a large amount of energy for operation. Since the rifle produces a muzzle energy of approximately 70 kilojoules per round, or 3500 kJ net muzzle energy for a 50 round magazine, this means the rifle needs to provide an electrical output of at least 1 kilowatt hour for every magazine. Thus the AAR-90 is powered by a 1.5 megajoule capacitor bank that is charged by a micro-fusion reactor cell located in the stock of the weapon. In practical use, the capacity of the AAR-90 is infinite provided ammunition is supplied. In addition, the railgun features an energy recycling system which allows up to 30% of energy expended on firing a round to be reused by the gun.

Ammunition

The primary ammunition of the AAR-90 is the 6 x 30 mm armour piercing guided bolt, or APGB for short. It is a 10 gram (150 grain) solid flechette of depleted uranium, fitted with a miniature targeting and guidance system located at the end of the round. The guidance system uses a graviton manipulation unit (GMU) to manipulate a gravimetric field around the bolt, allowing it negate bullet drop due to gravity and distort atmospheric particles around it, lessening air resistance. The GMU also allows corrections to the bullet's flight path and trajectory, guiding to accurately hit the target selected in the weapon's central guidance unit.

Variants

AAR-89

The AAR-89 was a prototype rifle design submitted by Axiom Defence for the Rifle 32XX competition to design a new service rifle with the Concordian military. It's primarily differed from the final weapon with a shorter barrel with only 70 electromagnets and a less powerful power supply consisting of a hydrogen cell.