The Genesis Arms GEN-12 is a semi-automatic shotgun built on an AR-style platform and designed around a proprietary operating system engineered specifically for 12 gauge ammunition. Unlike many shotgun conversions, the GEN-12 is purpose-built to function as a shotgun while retaining familiar AR-pattern controls and ergonomics. The firearm features an aluminum receiver set, detachable box magazine system, and a free-float handguard with accessory mounting capability. Its layout provides compatibility with a variety of optics and accessories, while the semi-automatic action is designed to cycle a broad range of compatible loads. Chambered in 12 gauge, this GEN-12 is equipped with a 19" barrel. The shotgun utilizes a magazine-fed design and AR-style controls, including a pistol grip and adjustable stock configuration. A full-length top rail allows for optic mounting, and the free-float handguard provides additional space for accessories. The combination of a semi-automatic action, detachable magazine system, and AR-pattern layout distinguishes the GEN-12 from traditional tube-fed shotgun designs.