Nordic Components Shotgun Magazine Extension 20 Gauge 6-Round

The Modular eXtension Tube, or MXT, line incorporates several improvements to help eliminate some of the problems commonly encountered when using an extended shotgun magazine tube. Prominent among these improvements is a barrel clamp relief groove cut into the extension tube's body. This groove stops the clamp from slipping and shifting under recoil, which can both damage a barrel's finish and change the gun's point of impact from shot-to-shot. The MXT line also features a reinforced tube end ca