Leave nothing to chance with 18+1 rounds setting a new standard capacity in .45 ACP. Suppressor-ready with a threaded barrel and co-witness tritium night sights this industry-first pistol is upgraded with the proven ergonomics of the FN 509 Tactical. Shooters can mount their favorite red dot optic in minutes adding pinpoint control on command. Complete with the high-endurance striker and crisp approximately 6lb. trigger pull the FN 545 Tactical is what other big bore pistols want to be when they grow up. - Specs - Caliber: .45 ACP - Operation: DOUBLE ACTION STRIKER FIRED - Mag Capacity: 10 or 15/18 Rd. - Weight: 31.0 oz - Barrel Length: 4.71 - Overall Length: 8.3 - Twist Rate: 1:16 RH - Height: 6 - Width: 1.45 - Trigger Pull: 5.5-7.7 lbs - Sight Radius: 6.1 - Primary Features - 18+1 rounds of .45 ACP - Low-profile Optics Mounting System - Precision-tuned trigger with clean break - Enhanced grip frame for unmatched control - Slide - Slide cut to mount most optics no gunsmith needed - Machined steel with front and rear cocking serrations empty chamber indicator - Tritium lamp steel dovetail sights co-witness with most MRD optics - High-endurance conical striker - Barrel - 4.71-inch cold hammer-forged target crowned for enduring accuracy - Polished feed ramp and chamber for feed reliability - Threaded .578x28 to mount compensators and suppressors - Frame - Superior balance and grip texture dampen recoil and allow master control - Target-grade trigger breaks clean at approximately 6lbs - Interchangeable backstraps - MIL-STD-1913 rail - OPERATING CONTROLS - Fully ambidextrous slide stop lever and magazine release - MAGAZINE - One 18-rd extended and one 15-rd magazine or two 10-rd magazines - Low-friction follower; polymer base with nickel-coated steel body - SHIPS WITH - Two interchangeable backstraps - One 18-round and 15-round magazines or two 10-round magazines - Four MRD mounting plates - Owner's manual - Locking device - Premium zippered case