Guntec USA Bolt Carrier Group BCG Mil-spec Nitride GT-BCG. The Bolt Carrier Group is made up of an 8620 Steel Bolt Carrier and a 9310 Bolt that is magnetic particle inspected. The mechanical surface of the Bolt Carrier is Nitride treated giving it...
Guntec USA Bolt Carrier Group BCG Mil-spec Nitride GT-BCG. The Bolt Carrier Group is made up of an 8620 Steel Bolt Carrier and a 9310 Bolt that is magnetic particle inspected. The mechanical surface of the Bolt Carrier is Nitride treated giving it...