This is a Springfield Armory Echelon 4.0 C semi-automatic pistol in 9mm Luger caliber. It has a 4" ported barrel, fixed U-notch rear sight, front night sight, optic ready slide, ambi-slide release, ambi-mag release, and interchangeable backstrap inserts. It comes with a Viridian green dot sight. This pistol is in nice condition with a clean, bright bore. It comes in the original box with zippered softcase, two 18-round magazines, 3 backstrap inserts, and cable lock.