This guide details the process of converting an AR-10 lower receiver to accept a Genesis Arms Gen 12 12-gauge upper receiver. The conversion involves replacing specific springs and pins in the lower receiver to handle the increased recoil and ensure reliable operation. The process also includes an optional bolt catch replacement to guarantee compatibility between the 12-gauge upper and a standard .308 upper.
This video details the Genesis Arms Gen-12 12-gauge upper receiver designed to convert an AR-10 lower into a semi-automatic 12-gauge firearm. The review highlights the innovative reciprocating barrel design, the lightweight yet robust 12-gauge bolt, and the specialized magazine follower that trips the bolt hold open. It also discusses the challenges of feeding various 12-gauge ammunition types and the necessary modifications to an AR-10 lower, such as a beveled magazine catch and a squared bolt catch, to ensure reliable function.
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