The AWM is a variant of the AW sniper rifle that is chambered for either the .300 Winchester Magnum or the .338 Lapua Magnum.
It has a longer bolt compared to the AW, in order to accommodate for the larger and more powerful magnum cartridges.
It's fed through a 5-round detachable magazine.

The AWM that is chambered for the .338 Lapua Magnum cartridge has been adopted since its first introduction in the British army and in the Dutch army in 1996. (
See the Arctic Warfare Magnum article for the full list.)

The British Armed Forces adopted the AWM that is chambered for the .338 Lapua Magnum and designated it as the L115A1 and in November 2007, it was announced that the British Army, Royal Marines and RAF Regiment were to get an improved variant of the L115A1, the L115A3.
The AWM is a variant of the AW sniper rifle that is chambered for either the .300 Winchester Magnum or the .338 Lapua Magnum. It has a longer bolt compared to the AW, in order to accommodate for the larger and more powerful magnum cartridges. It's fed through a 5-round detachable magazine.
The AWM that is chambered for the .338 Lapua Magnum cartridge has been adopted since its first introduction in the British army and in the Dutch army in 1996. (See the Arctic Warfare Magnum article for the full list.)
The British Armed Forces adopted the AWM that is chambered for the .338 Lapua Magnum and designated it as the L115A1 and in November 2007, it was announced that the British Army, Royal Marines and RAF Regiment were to get an improved variant of the L115A1, the L115A3.
Accuracy International Arctic Warfare