The Nordic Components standard shotgun barrel clamp provides extra rigidity for your magazine extension. Each clamp half has a centrally-located 10-32 threaded hole to accept accessories" such as a sling stud" barrel clamp tac rail or QD sling mount. Designed for Nordic extension tubes (1.060" diameter).

Features:
Threaded Hole to Accept Accessories
Picatinny Rail
Designed for Nordic Extension Tubes (1.060? Diameter)