The rifles are hand-built. The Arctic Warfare Super Magnum (AWSM) held the world record for the longest confirmed combat kill from 2009 up until April 2012.[3]

The rifle stock design is designed for good ergonomics. The comfort in holding the rifle and the reduced recoil aids accuracy.

The barrel is interchangeable with other calibres; this can be done in the field in about 15 minutes. With the barrel clamped in a barrel vise, the barrel is removed from the action, and another one screwed into the action and tightened in place with a torque wrench. Newer versions of Accuracy International rifles including the AX, AT (Accuracy Tactical), and AXMC (AX Multi-Calibre) feature a switch-barrel system that allow the user to change out the barrel with only the use of a 4mm hex wrench, allowing field barrel changes in under a minute.

The inherent accuracy of the rifle is due to the action being bolted with four screws and permanently bonded with epoxy material to an aluminium chassis which extends the entire length of the rifle stock, to which all major rifle components are in turn attached. As it keeps the action from moving away from zero (determined by the alignment of the scope to the rifle bore rather than the alignment of the action to the stock) the accuracy of the rifle is very high. Adding a folding stock handle, this sniper rifle can be used for both HALO insertions and walking deployments of sniper forces.

Accuracy International introduced their new AS50 .50 BMG calibre semi-automatic rifle at the 2005 SHOT Show in Las Vegas and their new AX Series at the 2010 Shot Show in Las Vegas.

The UK government announced in March 2008 the award of an £11 million contract to produce rifles for the British Army.[4]