Shop › CMMG AR-15 BUFFER RETAINER PARTS KIT CMMG AR-15 BUFFER RETAINER PARTS KIT $3.95 CMMG Buffer Retainer Parts Kit, Fits AR-15, Black/Silver 55AFFDC Quantity: Add To Cart Added! CMMG Buffer Retainer Parts Kit, Fits AR-15, Black/Silver 55AFFDC