This used FNH FNX-45 pistol fires the .45 acp round. It has a 4.5" barrel with a black slide and flat dark earth frame. This semi-auto pistol has an under barrel rail, an ambidextrous magazine release, an ambidextrous slide release, and an ambidextrous safety/decocker. It comes with three 15 round magazines, 2 backstraps, lock, manual, and a hard case. While FNH marks this finish as Flat Dark Earth, it looks a little like a dark OD green.