Knights Armament AR-15 SR-15 CQB Mod 2 Pistol Upper Receiver Assembly 5.56x45mm 11.5″ Barrel URX 4 M-LOK Handguard

The Knights Armament SR-15 E3 MOD 2 series’ 5.56mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E 3.2 round-lug bolt design both enhances function and increases bolt life far beyond the industry standard. The 5.56mm 3-Prong Flash Eliminator interferes with propellant gas combustion forward of the muzzle to significantly reduce flash signature, will not ring upon firing or when struck, and is compatible with the Knight’s line of 5.56mm QDC Signature Reduction Devices.