The FN 509 Tactical ships with one 24-round and one 17-round magazine. The 24-round option is the highest capacity available off the shelf for a production full-size 9mm: 24+1 rounds before a reload. The 4.5" threaded barrel (1/2x28), suppressor-height night sights, and optic-ready slide handle everything a suppressor host needs with no modifications required. FN's cold hammer-forged stainless barrel and FNC slide coating carry over from the base 509.

The 509 Tactical solves a problem most manufacturers create when they enter the suppressor market. Many optic-ready guns ship with standard-height sights that vanish behind a mounted can. The Beretta APX A1 is optic-ready but needs taller sights for suppressor use. The Glock G17 Gen5 MOS requires both a threaded barrel and suppressor-height sights to run a can. The FN is complete from the factory. At 27.9 oz and 7.9" overall with the threaded barrel, the gun is big. Holster selection narrows with a threaded barrel extending past the muzzle.

Buy the 509 Tactical if you already own a suppressor or have one in NFA jail. The included 24- and 17-round magazines, factory threaded barrel, and suppressor-height sights represent a genuine package that would take hundreds in aftermarket parts to replicate on other platforms. Skip it if you have no suppressor plans. The base FN 509 or a Walther PDP gets you into the same caliber with fewer features you will never use, and the Canik METE SFT offers 18 rounds with a better trigger for less.