KNIGHTS ARMAMENT SR-15 16 UPPER FUNDAMENTALS EXPLAINED

A viton o-ring prevents extractor vibration and lift, and a hard chrome exterior simplifies cleansing and maintenance. The five.56mm three-Prong Flash Eliminator interferes with propellant gasoline combustion ahead from the muzzle to significantly lessen flash signature, will not likely ring upon firing or when struck, and is particularly compatibl