Setting 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. Engineered with superior ergonomics and built to withstand the harshest conditions the 15-round Echelon 4.5 9mm pistol is configured for residents in states with magazine capacity limitations. In addition this fully ambidextrous pistol employs a revolutionary optics mounting system that allows for unparalleled adaptability with a broad range of optics. - Caliber 9mm - Color Black - Barrel 4.5 Hammer Forged Steel Melonite