KNIGHTS ARMAMENT SR-15 CQB 11.5 UPPER OPTIONS

A viton o-ring helps prevent extractor vibration and elevate, and a tough chrome exterior simplifies cleaning and maintenance. The 5.56mm three-Prong Flash Eliminator interferes with propellant gas combustion ahead on the muzzle to significantly lower flash signature, will never ring on firing or when struck, and is particularly suitable While usin