FN America FN 545 Tactical - Semi-automatic - Striker Fired - Full Size - 45 ACP - 4.71" Barrel - Polymer Frame - Flat Dark Earth - 1 -18 Rd Magazines and 1-15Rd Magazine - Non-Manual Safety - Suppressor Height Night Sights - Low Profile Optics Mounting System - Barrel Threaded .578x28 - Sight Protecting Slide Cap - Loaded Chamber Indicator - Interchangeable Backstraps - 1913 Accessory Ra il - Amb