Magpul Industries UCS Universal Carbine Stock Black Folding for M1913 Picatinny

The Magpul Industries UCS (Universal Carbine Stock) is a side-folding, adjustable buttstock built for firearms that use a vertical M1913 Picatinny rail as their stock mounting interface. Designed as a versatile upgrade for modern sporting platforms that would otherwise rely on fixed stocks or non-rail mounting systems, the UCS brings configurable folding and length-of-pull adjustment to a wide range of M1913-equipped rifles and pistol-caliber carbines.

A reversible hinge allows the stock to fold to either the left or right side, making the UCS compatible with a broad range of firearms including the BRN-180, Sig MCX, and similar M1913-equipped platforms. A five-degree drop at the buttpad provides clearance for charging handles and other controls, and the adjustable length of pull spans 7.6 to 10.6 inches to accommodate a variety of shooters and use cases.

Finished in matte black with clean, snag-free lines, the UCS reaches an overall length of 12.1 to 15.1 inches when deployed, weighs just 18 ounces, and measures a maximum of 1.9 inches wide at the hinge. Integrated QD sling mount points are built in, and installation is straightforward using common 5/32" and 1/8" hex wrenches.