The STG Universal 45 (U45) is our 45cal slow-fire addition to the U Series setups for the Stemple 76/45 machine gun. They feature a simple, smooth-running blow-back system. With the addition of a hydraulic buffer, these are the most smooth, controllable, and versatile subguns on the transferable market. It's so smooth due to the weight, layout, and action; you can actually watch your target being hit through a 4x scope while shooting long bursts. This setup utilizes AR pattern stocks, AR pattern grips, and multiple picatinny mount options for maximum versatility. Shooters can customize their preferred rates simply by adjusting the bolt parts.