Shop › FAXON 5.56 M16 BCG TIN FAXON 5.56 M16 BCG TIN $183.08 sold out Faxon Firearms Bolt Carrier Group, 5.56NATO, Fits AR-15, Titanium Nitride PVD Coated Bolt Carrier and Gas Key, Gold, Salt Bath Nitrided Bolt, Black FF556BCGCNITRIDE-TiN Sold Out Added! Faxon Firearms Bolt Carrier Group, 5.56NATO, Fits AR-15, Titanium Nitride PVD Coated Bolt Carrier and Gas Key, Gold, Salt Bath Nitrided Bolt, Black FF556BCGCNITRIDE-TiN