KNIGHT'S ARMAMENT SR-15 KS-2 5.56 NATO ASSEMBLED UPPER RECEIVER The KS-2 features a standard profile 14.5" cold hammer forged barrel, the most widely accepted general-purpose carbine barrel length. It is a light weight, high performing, feature-rich option. The 12.75" handguard allows multiple devices, such as laser pointers and night vision devices, to be placed on the top rail, in conjunction with the primary optic. SPECS Barrel: 14.5", cold hammer forged, 1:7" twist, chrome lined Cartridge: 5.56 NATO Mfg: Knights Armament