Engineered for carry, the Echelon 4" retains the key features of the full-size model, with a compact frame for enhanced concealability. Its Variable Interface System provides unmatched direct-mount compatibility with today's leading red dot sights and Tritium/Luminescent Front, Tactical Rack U-Dot Rear sights. The Gear Pac pkg includes four magazines, a Viridian RFX-11 green dot optic and a pistol bag.