Nordic Components Shotgun Barrel Clamp for 12ga Black Standard. These Gun Accessories from Nordic Components feature a 10-32 threaded hole for the attachment of sling studs QD sling mounts or other accessories. The Nordic Components 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 the Nordic Components Standard Shotgun Barrel Clamp 12ga. Specifications for Nordic Components Shotgun Barrel Clamp for 12ga: Manufacturer: Nordic Components Condition: New Gauge: 12 Features of Nordic Components Shotgun Barrel Clamp for 12ga: Provides extra rigidity for your magazine extension on most shotguns Each clamp half has a centrally-located 10-32 threaded hole to accept accessories Package Contents: Nordic Components Shotgun Barrel Clamp for 12ga Nordic Components BCL-12 Shotgun Barrel Clamp for 12ga Black Standard