Angstadt Arms AA40BUFKIT Buffer Kit with Black Finish & weighs 10 oz for 9mm Luger, 40 S&W & 45 ACP AR-15 Includes Carbine Buffer Spring

Complete 10oz AR-15 extra heavy buffer kit gives you everything you need to get your 9mm, 40 S&W or 45 ACP AR-15 running smoothly. Compatible with both GLOCK and Colt style magazines.