FN 509 Midsize 9mm Pistol 15rd Black Stainless - FN20100348

The FN 509 Midsize delivers the proven reliability of FN's military contracts in a concealed carry-optimized package. This striker-fired pistol bridges the gap between full-size performance and compact concealability with its 4-inch barrel and 15-round capacity.

What Makes This Different

Unlike standard polymer pistols, the FN 509 Midsize features a fully ambidextrous design with reversible magazine release, ambidextrous slide stop levers, and a low-profile, snag-free slide profile. The MIL-STD-1913 accessory rail accommodates tactical lights and lasers, while the interchangeable backstrap system ensures proper grip fit across different hand sizes. Cold hammer-forged barrel construction delivers consistent accuracy that exceeds many competitors in its class.

Key Features

• 4-inch cold hammer-forged stainless steel barrel with recessed target crown
• 15+1 capacity with two included magazines
• Fully ambidextrous controls including slide stop and magazine release
• Low-profile, snag-resistant slide with front and rear cocking serrations
• MIL-STD-1913 Picatinny rail for accessories
• Interchangeable backstrap system (Small, Medium, Large included)
• Fixed 3-dot luminescent sights

Field testing demonstrates consistent sub-3-inch groups at 25 yards with quality ammunition. The 509 Midsize functions reliably across temperature extremes and maintains zero through extended firing sessions. Law enforcement agencies have adopted the FN 509 platform for duty use, validating its performance under demanding conditions. The trigger breaks cleanly at approximately 5.5-7 pounds with minimal overtravel.

Technical Specs

• Caliber: 9mm Luger
• Barrel Length: 4.0 inches
• Overall Length: 7.4 inches
• Height: 5.5 inches
• Width: 1.35 inches
• Weight: 26.5 oz (unloaded)
• Capacity: 15+1 rounds
• Frame Material: Glass-filled polymer
• Slide Finish: Black stainless steel
• Sight Radius: 6.1 inches
• Country of Origin: USA

The FN 509 Midsize represents proven engineering from a manufacturer trusted by military forces worldwide. Current production models incorporate refinements based on extensive field feedback, making this an optimal choice for serious shooters seeking reliable performance.