The Echelon from Springfield Armory sets a new standard for modern, striker-fired duty pistols. With a host of patent-pending features, this modular and highly adaptable handgun is designed around a durable stainless steel chassis and innovative optics mounting system. Available in full-size (4.5F) and new compact (4.0C) configurations, it is engineered with superior ergonomics and built to endure the harshest conditions. The patent-pending Echelon firmly secures its place at the forefront. The Echelon from Springfield Armory - Unparalleled.Features :Fits Springfield EchelonDesigned for Holosun EPS OpticsIncludes Hardware, Torx Bit, Vibratite, and an Install Card