Springfield Armory Echelon 9mm 4.5in OD Green Pistol 20+1 Rounds - Engineered with superior ergonomics and built to withstand the harshest conditions, the Echelon 4.5in 9mm handgun sets a new standard for modern, striker-fired duty pistols. With a host of patent pending features, this modular pistol is designed around a robust stainless steel chassis and revolutionary optics mounting system. Fully ambidextrous and finished in durable OD Green Cerakote, the Echelon features a U-Dot sight system for fast target acquisition and includes two magazines. Features Central Operating Group - The all-new Central Operating Group is self-contained and serialized, providing a robust housing for the patent pending operating system. OD Green Cerakote - Finished in Cerakote to exceed the most rigorous demands, ensuring your firearm stands strong when it matters most. Variable Interface System - By utilizing a set of movable pins, the Variable Interface System on the Echelon achieves a low, direct mount optics solution for improved sight picture and intuitive alignment.