KS-1 rifle

The KS series of rifles are produced by Knight's Armament Company (KAC). They are designed as updated versions of their AR-based SR-15 rifles. The 13.7" KS-1 variant was adopted as the L403A1-AIW by the British Armed Forces in 2023 to supplement the L85A2-A3 and L119A1-A2 rifles used by Royal Marines and the British Army Ranger Regiment.