Manufacturer: TacStar BMCU
A barrel clamp secures magazine extensions and provides a sling swivel mounting point. A barrel magazine clamp is highly recommended for shotguns with magazine extensions to keep the mag extension secure and on the gun under harsh handling or extreme conditions. This part stabilizes the Magazine Extension by clamping it to the barrel.
Specifications and features:
Stabilizes magazine extension
Includes stud for QD swivel
Fits Benelli M1, M2, Remington 1100,11-87, and Mossberg 500 shotguns