The Genesis Arms GEN-12 10.5'' Upper Receiver 12 Gauge delivers a compact, high-performance platform for rifle enthusiasts seeking versatility in a lightweight upper assembly. Built to integrate with standard AR-style systems, this Gen-12 UPPER RECEIVER 12 GAUGE combines precise machining and robust materials to enable reliable semi-automatic operation with 12-gauge ammo, expanding field and range options for slugs and buckshot setups alike. Designed for shooters who demand quick handling, the 10.5-inch profile supports agile maneuverability in hunting blinds, close-quarters engagements, or competitive stages, while maintaining solid muzzle control and consistent gas operation. This upper receiver, part of Genesis Arms rifle parts and upper receiver assemblies lineup, emphasizes modularityallowing you to pair it with compatible lowers and bolt carriers to customize energy management, cycling reliability, and overall system balance for a variety of loads. Whether youre upgrading a compact tactical build, outfitting a dedicated 12-ga platform for game hunting, or exploring practical shotgun adaptations, the GEN-12 upper delivers a cohesive, precision-focused solution that leverages Genesis Arms engineering heritage and your preferred defense, sport, or hunting applications.