Standard clamp fits most shotguns when used with a Nordic Components Extension. Our tube has an OD of 1.06. - The Nordic Components shotgun barrel clamp provides extra rigidity for your magazine extension. Includes Picatinny rail and mounting screw. - Fits most shotguns when used with a Nordic Components Extension - Features 10-32 threaded hole for mounting Picatinny rails or other accessories - Includes 1.5 Picatinny rail for mounting flashlight laser or other compatible accessory - Can be used as regular shotgun barrel clamp without Picatinny rail installed - Shotgun barrel clamp not compatible with original Browning Auto-5 or similar shotguns with reciprocating barrel
Determined at checkout.