Springfield Echelon, Semi-automatic, Striker Fired, Polymer Framed Pistol, Full Size, 9MM, 4.5 Barrel with Integral Compensator, Melonite Finish, Black, Optics Ready Slide, Tritium/Luminescent Front, Tactical Rack U-Dot Rear Sight, 2 Magazines, (1)-17 Round and (1)-20 Round EC9459B-U-COMP Built around a robust stainless steel chassis, the Echelon 4.5F Comp handgun features an integral compensator with a single port on the hammer-forged slide and barrel, reducing muzzle rise for faster, more accurate follow-up shots. The revolutionary Variable Interface System offers unparalleled adaptability with today's most respected red dot sights, while fully ambidextrous controls and interchangeable backstraps accommodate a broad range of shooters.