The M21 Sniper Weapons System rifle.
The M21 Sniper Weapon System (SWS) is the semi-automatic sniper rifle adaptation of the M14 rifle. It is chambered for the 7.62×51mm NATO cartridge.
In 28 Weeks Later[]
During the US Army-led repatriation of London by NATO, most of the rooftop snipers guarding District One each had an M21 rifle.
