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Genesis Arms builds the GEN-12, a magazine-fed 12 gauge on the AR platform, in Coeur d'Alene, Idaho. It's a patented 12ga upper that runs on an AR-10/.308 lower, so the controls are the ones you already know. The magazine is Genesis' own patented design, and the gun chambers both 2¾" and 3" shells. Ships to your FFL.
Custom builds are nearly always single availability — when one sells, it's gone.
