The FN 509 is built on the proven architecture of the FNS Compact, FN made changes internally and externally to meet the rigorous performance standards of the MHS requirements and further developed the platform into the FN 509 with the help from industry experts. Over the course of development, the platform has been tested extensively for reliability, ammunition compatibility and durability totaling more than one million rounds. Caliber: 9mm Operation: Double-action Mag Capacity: 10 Rd. Weight: 26.9 oz. Barrel Length: 4.0" Overall Length: 7.4" Twist Rate: 1:10" RH Length: 7.4" Height: 5.56" Width: 1.35" Trigger Pull: 5.5-7.5 lb. Sight Radius: 5.79" GENERAL SPECIFICATIONS Striker-fired autoloader Double-action operation Offered as a non-manual safety model Fixed 3-dot luminescent sights SLIDE Easily racked, combat-style sights External extractor; loaded chamber indicator Improved front and rear cocking serrations BARREL Cold hammer-forged stainless steel Recessed target crown Polished chamber and feed ramp FRAME Enhanced grip texture which enables faster follow-up shots in all conditions Interchangeable backstraps MIL-STD-1913 accessory mounting rail OPERATING CONTROLS Fully ambidextrous slide stop lever and magazine release MAGAZINE High visibility, low-friction follower; polymer base with black finish SHIPS WITH Two interchangeable backstraps Two 10-round magazines Owners manual Locking device FN logo soft pistol case
