This is a CMMG Buffer, model 38CA929.
CMMG'S 308 AR Carbine Buffer Assembly can be used in conjunction with the CMMG 308 carbine buffer spring in AR-15 buffer tubes. Compatible with LR-308" Mk3 and AR-10's. All CMMG parts are made in the United States from the best materials available. CMMG guarantees its products against defects in material or workmanship for the life of the product.
Features:
Fits LR-308 MK3 and AR-10
