Dead Foot Arms AR15 Folding Stock Adaptor Kits are built around our Modified Cycle System (MCS) to provide reliable fire-while-folded capability. Each kit includes the necessary components for streamlined installation, with options tailored to rifle calibers or 9mm platforms. Whether you’re outfitting a new build or upgrading an existing rifle, these systems are engineered for durability, compactness, and compatibility across a range of AR configurations.