The FN 509 Midsize Tactical pistol in 9mm with a flat dark earth finish and 24-round extended magazine (brand part no. 66-101938) ships red-dot and suppressor ready, with a factory-mounted Holosun 407C and a threaded barrel for training sessions that demand higher round counts. FN America builds the pistol with FN’s Low-Profile Optics-Mounting System and a 4.5-inch cold hammer-forged stainless steel barrel threaded 1/2-28 for a suppressor or muzzle device. Suppressor-height 3-dot night sights co-witness through the optic, and an external extractor, loaded chamber indicator, and flat-faced trigger round out the tactical feature set. Two magazines, a case, locking device, and owner’s manual ship with the pistol. Among high-capacity semi-auto handguns, this 509 Midsize Tactical 24-round configuration favors shooters who want maximum capacity for extended training sessions.

Key Specifications

• The chambering is 9mm.
• The capacity is 24 rounds.
• The barrel measures 4.5 inches and is threaded 1/2-28 for suppressor use.
• The pistol ships equipped with a Holosun 407C red dot optic.
• The finish is flat dark earth (FDE).
• The sights are suppressor-height 3-dot night sights, co-witnessing through the optic.
• A case, locking device, and owner’s manual ship with the pistol.
• The slide is Optic Cut and Serrated.
• Rifled with a 1:10-inch RH twist rate.
• Ships with 2 magazines.

Frequently Asked Questions

What is the magazine capacity of this configuration? 24 rounds, the extended-magazine option for higher round-count training.

Does this pistol come with a red dot optic? Yes, it ships factory-equipped with a Holosun 407C.

Buy the FN 509 Midsize Tactical, FDE 24-Round

Two magazines, a case, locking device, and owner’s manual ship with the pistol is exactly what this FN 509 Midsize Tactical, FDE 24-Round delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.