Quick Tip: Installing the KNS AR / MCX Picatinny Stock Adapter
This video provides a technical walkthrough by Brownells Gun Tech Caleb Savant on how to install the KNS Precision AR / MCX Picatinny Stock Adapter. This adapter allows for the mounting of M1913 Picatinny-mount stocks on standard mil-spec AR-15 lower receivers, particularly useful for AR-15 type uppers with self-contained recoil systems that eliminate the need for a traditional buffer assembly. The kit includes a plug, recoil buffer, spring, detent, and an M1913 rail section. The description highlights compatibility with various upper receiver systems like the Brownells BRN-180, SIG Sauer MCX/MPX, Foxtrot Mike FM-9/FM-15 Gen2, and CMMG .22 conversion, and mentions several compatible stock options from manufacturers like JMAC Customs and Midwest Industries.








