https://vizardsgunsandammo.com/fn-66100527-509-tactical-9mm-luger-4-50-threaded-barrel-10-1-matte-black-polymer-frame-with-mounting-rail-optic-cut-matte-black-stainless-steel-slide-no-manual-safety-optics-ready/?ctk=5695dde2-4ea1-4133-abd3-02b72a814466&showHidden=true&goal=0_6872f3eb95-6d067925b5-168425209&mc_cid=6d067925b5&mc_eid=6b6c3eb5a1

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The FN 509 Tactical, an extension of the FN 509 family, is based on FN's submission pistol that the U.S. Army tested for its Modular Handgun Trials, but includes the significant improvements to the design that were implemented in the FN 509. The pistol features a patent-pending Low-Profile Optics Mounting System that enables the platform to accept miniature red dot (MRD) optics that co-witness with the suppressor-height night sights. The slide cap has raised sight wings that protect iron sight alignment if the pistol is dropped or jostled, and provides a textured ramp for racking the slide against a belt loop, pant pocket or boot. An FN-signature 4.5-inch, cold hammer-forged, stainless-steel barrel with target crown, 1/2" x 28 threads that accept the bulk of 9mm suppressors available and thread cap with integrated O-ring to prevent loosening during use complete the top end. The 509 Tactical ships with two interchangeable backstraps and FN logo soft pistol case. This model has a black finish and comes with three 10-round magazines.

Brand FN
Category Pistols
Series Tactical
Caliber 9mm Luger
Barrel Length Range 4" to 4.99"
Model 509
Capacity 10+1
Action DAO
Frame Finish Matte Black
OAL 7.90"
Frame Material Polymer
Hand Right
Sight Style Night
Slide Finish Matte Black
Slide Material Stainless Steel
Slide Description Serrated Stainless Steel / Optic Cut
Grips Textured Black Interchangeable Backstraps
Sight Configuration 3-Dot Night, Suppressor Height
Includes 3 Magazines / Optic Mounting System
Safety Loaded Chamber Indicator
Barrel Description Threaded
Barrel Length 4.50"
Max Capacity 10
Weight 27.90 oz
Frame Description Polymer w / Picatinny Rail