The Barrel Clamp for 12ga to your weapon for extra extension tube support. These Bipod Accessories  feature a 10-32 threaded hole for the attachment of sling studs, QD sling mounts or other accessories. The Component 12-Gauge Shotgun Barrel Clamp protects the quality of your firearm by providing enhanced rigidity for your magazine extension on most compatible shotguns. Keep your weapon in top-shelf condition and functioning at its full capacity with Barrel Clamp, 12ga.