FN 509 Midsize Tactical 9mm Pistol 15+1/24+1 4.5" Threaded Barrel

The FN 509 Midsize Tactical delivers professional-grade performance in a compact platform designed for tactical applications. This striker-fired pistol combines FN's military heritage with modern features that serious shooters demand.

What Makes This Different

The 509 Midsize Tactical bridges the gap between full-size duty pistols and compact carry guns with its optimized 4.5-inch barrel length. Factory threading accepts standard 1/2x28 suppressors without aftermarket modifications. The cold hammer-forged barrel delivers consistent accuracy while the low-profile optics mounting system accommodates popular red dot sights without co-witness issues.

Key Features

• Factory-threaded 4.5" cold hammer-forged steel barrel with target crown
• Optics-ready slide cut accepts popular micro red dot sights
• Ambidextrous controls including slide stop and magazine release
• Picatinny accessory rail for lights and laser systems
• Two magazine capacity options: 15-round flush fit and 24-round extended
• Interchangeable backstrap system for custom grip sizing
• Enhanced trigger with tactile and audible reset

Field testing demonstrates consistent sub-2-inch groups at 25 yards with quality ammunition. The pistol functions reliably with both subsonic and supersonic loads, making it suitable for suppressed shooting. Law enforcement agencies have adopted the 509 platform for duty use due to its proven durability through 20,000+ round torture tests. The midsize frame provides excellent control during rapid fire while remaining concealable for plainclothes applications.

Technical Specs

• Caliber: 9mm Luger
• Barrel Length: 4.5 inches, 1/2x28 threading
• Overall Length: 7.4 inches
• Height: 5.5 inches
• Width: 1.35 inches
• Weight: 27.2 ounces (unloaded)
• Frame Material: Glass-filled polymer with stainless steel chassis
• Slide Material: Stainless steel with matte black finish
• Magazines: One 15-round, one 24-round included
• Sights: Three-dot luminescent front and rear
• Country of Origin: USA

Professional shooters choose the FN 509 Midsize Tactical for its proven reliability and versatile feature set. Limited production runs mean availability fluctuates, making immediate acquisition advisable for serious applications.