Nordic Components Shotgun Barrel Clamp, Designed for 12GA MXT Extensions, Compatible with Most 12GA Shotguns, Features 10-32 Threaded Hole On Each Side for Mounting Accessories and Rails, Not Compatible with Mossbergs, Benelli Nova/Super Nova BCL-12

Nordic Components Shotgun Barrel Clamp, Designed for 12 Gauge MXT Extensions, Compatible w, BCL-12-MB

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Nordic Components Shotgun Barrel Clamp with Tactical Rail, Designed for 12GA MXT Extension, BCT-12

Nordic Components Low-Drag Shotgun Follower, Compatible with Most 12GA Shotguns, Not Compatible with Benelli Nova/SuperNova/Vinci/Super Vinci, Shotguns with Magazine Dimples Must Have Dimples Removed Prior to Installation, 12GA Only FOL-SG-12

Nordic Components Shotgun Barrel Clamp, Designed for 12 Gauge MXT Extensions, Compatible w, BCT-12-MB