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

Specifications:

• Buffer weight: 10oz
• Buffer length: 4″. No need for a spacer
• Bumper color: Blue

Contents include:

• 10oz 9mm buffer
• Carbine buffer spring