Gauge: 12 ga. Barrel: 30-in. vent rib. Length: 52 in. Weight: 6.75 lbs. Stock: Black polymer. Features: Goose variant of the inertia-driven MC312 line. Lightweight aircraft aluminum receiver with machined integral accessory rail for the included red-dot optic. Fiber-optic front sight. Ships with five extended choke tubes. Same 5+1 capacity as the standard MC312.