Springfield Armory FirstLine Kuna .40 S&W Pistol with FSA Folding Brace, 6" Threaded Barrel Overview The Springfield Armory Kuna FirstLine is a compact .40 S&W pistol built around a roller-delayed operating system that helps reduce felt recoil and improve control. It combines a 6-inch threaded barrel, ambidextrous controls, hybrid flip-up sights, M-LOK handguard, and a Strike Industries FSA folding brace for enhanced stability and portability. Key Features Roller-delayed system reduces felt recoil 6-inch cold hammer forged, Melonite-finished barrel with 9/16A-24 threads Strike Industries FSA folding brace and Picatinny end plate Ambidextrous controls with reversible, non-reciprocating charging handle Integral M-LOK handguard, flip-up sights, multi-port muzzle brake, and flat trigger Includes (2) 30-round translucent magazines with metal feed lips Specifications Manufacturer/Model: Springfield Armory Kuna FirstLine Caliber: .40 S&W Receivers: Monolithic Type III hardcoat-anodized aluminum upper; glass-filled polymer lower Operating System: Roller-delayed Barrel: 6 inches, 1:16 twist Length: 15.5-24.5 inches Weight: 5 pounds, 5 ounces Grip: AR-pattern with Adaptive Grip Texture Safety: Ambidextrous Magazine Capacity: 30 rounds MPN: KN90640B-FSA-FLUPC: 706397011093 Applications Ideal for range training, personal defense, recreational shooting, and compact pistol-caliber applications where maneuverability and recoil control are priorities. Additional Features The folding brace supports compact storage and quick deployment, while the translucent magazines allow fast ammunition checks. Please check out our special deals on .40 S&W ammunition.