KAC Knights Armament Company SR-15 KS-1 5.56mm Upper Receiver Kit 13.7 121435

Knight's Armament 5.56mm SR-15 KS-1 13.7" Upper Receiver Kit (P/N: 121435) delivers cutting-edge performance engineered as the commercial variant of the official U.K. Special Forces rifle contract. Features a 13.7-inch proprietary cold hammer-forged barrel paired with an advanced mid-length gas system for optimized recoil management. Equipped with a rigid M-LOK handguard and the upgraded E3.2 bolt featuring dual ejectors for supreme operational reliability. Includes a complete upper assembly with charging handle and bolt carrier group ready for duty drop-in.