This review explores budget-friendly Picatinny stocks imported from China, specifically the 5KU brand, which are marketed for airsoft but prove surprisingly durable. Despite high-end US-made stocks costing over $300, these Chinese alternatives are available for around $60-$67. Rigorous testing, including live fire and destructive stress tests, demonstrated their solid aluminum and steel construction, making them a viable option for most firearm builds.
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.
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