Strike Industries offers replacement components for the AR-15 that are made to military specifications. Available in .223 calibers and .308, these high quality components will provide excellent fit and reliable function in your AR series rifle. They come in PRO sets which are 10 piece bulk packages. The S.I. crush washers are great for replacing your used ones and for installing a new muzzle device onto your AR.
– Available in .223 or .308
– PRO package include 10 pieces
– Matte Finish to match most muzzle devices
– Proper hardness to ensure ease of installation and reliability