These 5.56/300 blk bolt carrier groups are melonited, full-auto rated, are properly staked, and the bolts are matched to the barrel.The rosco melonited bolt carrier groups are designed to meet the modern-day carbine shooters requirements.
Finish: Black Melonite
Material: Stainless Steel
    Finish: Black Melonite
Material: Stainless Steel
 
         
                     
                     
             
             
            