KNIGHT'S ARMAMENT SR-15 KS-3 5.56 NATO SEMI-AUTO RIFLE The KS-3 features a standard profile 11.5" cold hammer forged barrel, with an optimal length for those that need a small rifle-caliber carbine. It is easy to stow for transport, unobtrusive to carry, and highly efficient in use. With nearly 100% compatibility with the other KS rifles, it is the recommended choice for a secondary upper receiver for those with KS-1 or KS-2 rifles, or as a primary system for those that require a dependable, small, light carbine. SPECS Barrel: 11.5", cold hammer forged, 1:7" twist, chrome lined Cartridge: 5.56 NATO Weight: 6.1 lbs Mfg: Knights Armament