Tag Archives: box mag fed semi auto shotgun build

CMMG Gas Piston/Op-Rod-Driven Semi-Auto AR Shotgun (Box Mag-Fed)

By David Crane defrev at gmail dot com February 8, 2009 While DefenseReview was at the CMMG Inc. booth at SHOT Show 2009, CMMG co-owner Jeff Overstreet showed us a very interesting prototype gas-piston/op-rod-driven AR-config semi-auto 12-gauge shotgun. The new shotgun features aluminum billet upper and lower receivers and winter triggerguard, and it will utilize a proprietary CMMG box magazine …

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