F5 MFG Modular Stock System (MSS) for PSA JAKL

The PSA JAKL ships with a fixed-length F5 folding stock that folds and locks but offers no comb-height or length-of-pull adjustment. The F5 MFG Modular Stock System replaces it with a telescoping, left-side-folding stock that adjusts for both comb height and length of pull, giving you a repeatable cheek weld behind a magnified optic and a fit that works across body armor and different shooters.

The kit ships with the JAKL-specific adapter. The JAKL rear is a proprietary interface, not a native 1913 rail, so the included adapter is what bolts the MSS to the receiver. That makes this a complete stock solution rather than a bare stock you have to source a mount for. The system is 922r compliant, which matters when you are counting foreign parts on an import-parts build.

This is the more adjustable folder for a JAKL that will wear an LPVO or prism and see real range time. It fits Gen 2 JAKL rifles in 5.56, 300 BLK, and 9mm. A separate .308 version covers the large-frame JAKL, so confirm your caliber before ordering.