The SpringfieldA(R) Armory Echelon is built for those who need a compact, carry-friendly handgun without sacrificing performance. The innovative Variable Interface System ensures seamless red dot compatibility, while the Tritium 3-Dot sights provide fast target acquisition in any lighting condition. With a modular, serialized design and two magazine options, this pistol offers versatility and reliability in a sleek, concealable package. 9mm caliber 4" barrel Tritium 3-Dot sight system Variable Interface System for direct red dot mounting Serialized Central Operating Group Includes (1) 15-round flush magazine and (1) 18-round extended magazine Melonite finish Double-zipper case included