FM Products .46 Caliber Bolt Carrier and Heavy Buffer 8.5 oz w/.308 Carbine Recoil Spring Black

FM Products .46 Caliber Bolt Carrier and Heavy Buffer 8.5 oz w/.308 Carbine Recoil Spring Black. Each kit contains a complete Premium FM45 Bolt Carrier Group BCG .308 Carbine Recoil Spring and an extra heavy 8.5 oz buffer to ensure proper function on your 45CAL Glock Style PCC Build. The 6.4oz Heavy Buffer is the perfect weight to ensure reliable feeding of any blow-back operated PCC 3.7in overall length requires no spacer and helps prevent bolt catch breakage. Smoother function less felt recoil