18+1 rounds leave nothing to chance"" 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 sight in minutes"" adding pinpoint control on command. Complete with the high endurance striker and crisp"" 6-lb. trigger pull"" the FN 545 Tactical is what other big bore pistols want to be when they grow up.