The Accuracy International AX long range sniper rifle series was designed for long, high-powered super magnum cartridges and was unveiled in January 2010 at the SHOT Show trade show.
It is a major design evolution based on the AWM variant of the AW series and its development was according to Accuracy International partly driven by a Precision Sniper Rifle (PSR) U.S. Special Operations Command solicitation.
The PSR contract was awarded in 2013 to Remington Arms for their Modular Sniper Rifle.

The AX series comprises the multi calibre AXMC chambered either in .338 Lapua Magnum, .300 Winchester Magnum, and 7.62×51mm NATO/.308 Winchester, which can be reconfigured in minutes by simply changing the barrel, bolt and magazine/insert.
In addition the AX series consists of the non-multi calibre AX308 chambered in 7.62×51mm NATO/.308 Winchester and the AX50 chambered in .50 BMG
The Accuracy International AX long range sniper rifle series was designed for long, high-powered super magnum cartridges and was unveiled in January 2010 at the SHOT Show trade show. It is a major design evolution based on the AWM variant of the AW series and its development was according to Accuracy International partly driven by a Precision Sniper Rifle (PSR) U.S. Special Operations Command solicitation. The PSR contract was awarded in 2013 to Remington Arms for their Modular Sniper Rifle.
The AX series comprises the multi calibre AXMC chambered either in .338 Lapua Magnum, .300 Winchester Magnum, and 7.62×51mm NATO/.308 Winchester, which can be reconfigured in minutes by simply changing the barrel, bolt and magazine/insert. In addition the AX series consists of the non-multi calibre AX308 chambered in 7.62×51mm NATO/.308 Winchester and the AX50 chambered in .50 BMG
Accuracy International Arctic Warfare