NightForce XTREME Duty Ultralite One-Piece Compact Mag Mountt0 MOA 3 Jaw/Nut30mm 1.375in Black. The XTREME Duty Ultralite One-Piece Compact Mag Mount is a one-piece military standard 1913 mounting system with zero MOA of tamper and true mounting alignment. There is a three-jaw clamping system as well. The XTREME Duty Ultralite One-Piece Compact Mag Mount is the better mounting solutions for AR and chassis type rifle platforms with military standard rail and built-in taper. Specifications for NightForce XTREME Duty Ultralite One-Piece Compact Mag Mount: Manufacturer: NightForce Fabric/Material: Aluminum Color: Black Condition: New Finish: Anodized Hand: Ambidextrous Gun Type: Rifle Features of XTREME Duty Ultralite One-Piece Compact Mag Mount: One-piece Mil-Std. 1913 mounting system "Zero" MOA of taper with true mounting alignment Three-jaw clamping system Package Contents: XTREME Duty Ultralite One-Piece Compact Mag Mount NightForce A256: XTREME Duty Ultralite One-Piece Compact Mag Mountt0 MOA 3 Jaw/Nut30mm 1.375in Black