Springfield Armory(R) Echelon 4.5F Gear Pac is a full-size semi-automatic pistol chambered in 9mm. It features a 4.5 in hammer-forged steel barrel with Melonite finish black polymer grip module and optics-ready billet-machined steel slide. This striker-fired pistol includes 17-round and 20-round magazine configurations U-Dot sights a Viridian RFX-11 green dot optic and a pistol bag.Key Features4.5 in hammer-forged steel barrel chambered in 9mmFull-size semi-automatic pistol with 17-round and 20-round magazine configurationsOptics-ready slide with Variable Interface SystemU-Dot sight system with black polymer grip moduleGear Pac package includes four magazines Viridian RFX-11 green dot optic and pistol bagSpringfield Armory(R) offers firearms designed for defensive duty sporting and recreational applications. The company combines established firearm designs with modern manufacturing materials and feature sets. Springfield Armory(R) firearms include a broad selection of pistols and long guns designed around reliability practical handling and contemporary shooting requirements.