KNIGHTS ARMAMENT SR-15 16 UPPER NO FURTHER A MYSTERY

A viton o-ring prevents extractor vibration and elevate, and a tough chrome exterior simplifies cleaning and routine maintenance. The 5.56mm 3-Prong Flash Eliminator interferes with propellant fuel combustion forward from the muzzle to drastically reduce flash signature, will not likely ring on firing or when struck, and is also suitable with the K