M-Lok finger rest | TST Beretta APX Polymer magwell for FN 509T

Polymer magwell for FN 509T

Optimized hand placement and trigger consistency — ergonomic shaping and surface texture encourage a repeatable grip and proper finger alignment

Folding mechanism keeps the SMG compact for transport and deploys instantly for use

compatible with any red dot sight built to the RMR or RTS footprints — whatever the optic's brand

Index finger rest for a consistent

M-Lok finger rest | TST Beretta APX Polymer magwell for FN 509TM LOK finger rest. Fits any M LOK compatible handguard. Index finger rest for a consistent, repeatable support hand reference point. Consistent hand reference the support hand finds the same position every time, making grip repeatable and reducing shot to shot variation. Anchors the index finger for improved barrel control during recoil and rapid strings. Provides reliable grip traction and hand reference even with gloves or sweaty hands. Made in