The A3 Industries Para Folding Stock provides a unique solution for mounting traditional M4-based AR stocks onto your favorite non-AR firearms, without the need for an AR buffer tube. The special stock extension utilizes a popular steel APEX Picatinny hinge that mounts to any Mil-spec 1913 Picatinny mount. The extension is machined around Mil-spec buffer tube dimensions to allow any M4-based adjustable stock to be installed, opening up all kinds of options not previously available. The pARa-stock offers 7 adjustment settings and, when paired with our hinge, can fold right or left by flipping the hinge. At the front of the stock extension, there is an M-LOK slot for mounting a Quick-disconnect (QD) sling socket, if desired. Machined from 6061 aluminum with low-gloss hardcoat finish.