Factory Cerakote Tungsten burnt bronze finish. MasterPiece Arms is expanding on the new model Defender series with a 9mm Luger carbine that uses Glock-pattern magazines. 45 Revolver Because of its unique design, the Pitbull would serve as a perfect backup to your everyday-carry. MPA20DMG 9mm Carbine - All Aluminum Lower, Burnt Bronze - By Masterpiece Arms. MPA20DMG 9mm Carbine - All Aluminum Lower, Burnt Bronze. A look back at our video examining the MPA20DMG. This is our new 9mm Carbine based on the 930DMG Pistol but in a full size frame.