Pre-Order Only. The most advanced side charging receiver for the AR15, M16 and M4 rifle. The G4 SCU evolves the AR15 into a fully ambidextrous rifle that is side charged, and customizable to the shooters preference for ejection, and charging. Engineered to work with any AR15 lower receiver, and any impingment or piston driven system. The system easily adapts without tools. Manufactured from billet aluminum, and type III hardcoat anodized for maximum durability the G4 SCU is ready to take on any mission.
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