Springfield Armory Echelon 9mm 4.5F, Black (EC9459BMS-U)Description Engineered with superior ergonomics and built to withstand the harshest conditions, the Echelon handgun sets a new standard for modern, striker fired duty pistols. Featuring a frame mounted ambidextrous thumb safety, this modular pistol is designed around a robust stainless steel chassis and revolutionary optics mounting system. Fully ambidextrous, the Echelon features a U Dot sight system for fast target acquisition and includes two