Springfield Echelon 4.5F Threaded, 3-Dot Tritium 9mm (ECT9459B-3D)Description The Echelon 4. 5" 9mm threaded barrel pistol with three dot tritium sights sets a new standard for modern, striker fired duty pistols. With a host of patent pending features, this fully ambidextrous handgun is designed around a robust stainless steel chassis and a revolutionary optics mounting system. The tritium 3 dot sight configuration delivers superior low light performance while the 1 2x28 threaded barrel is ready for mounting the