Made from aluminum with a sleek and durable matte black finish, the CMMG® Pistol Receiver Extension (Buffer Tube) kit includes what you need to finish up your AR pistol lower. The ambidextrous sling mount end plate makes for quick attachment and easy sling adjustment. This kit is designed to work correctly with both .300 AAC blackout and 5.56mm NATO AR pistol builds.

Includes:

• Pistol Buffer Tube
• Ambi Sling Mount/Receiver End Plate
• Castle Nut
• Buffer
• Action Spring