KNS Precision AR/MCX Stock Adapter with Flange - AR-15 Buffer to Picatinny Rail

The KNS Precision AR/MCX Stock Adapter with Flange is a purpose-built steel mount that lets you attach a 1913 Picatinny rail stock or brace (such as the SIG MPX folding stock or SB Tactical FS1913 brace) in place of a standard AR-15 buffer tube.

Designed for use on AR-15 and Beretta MCX pattern platforms, this version features a flange integrated into the base of the Picatinny plate so the rifle can still accept a standard takedown pin, detent, and spring on the lower receiver. The included adapter plug threads into the buffer socket of the AR-15 lower receiver, and the Picatinny rail section is secured to the plug with the supplied mounting bolt.

Machined from steel and finished in a low-glare matte black coating, the KNS Precision AR/MCX Stock Adapter with Flange is a compact, drop-in solution for shooters who want to run a folding or stabilizing picatinny-equipped stock or brace on an AR-pattern rifle without permanent modification.