The Echelon features a durable polymer frame with a black Melonite finish, ensuring a sleek appearance and excellent resistance to wear. The 4.5" barrel, combined with a 1-in-10 twist rate, provides precise accuracy and reliable performance with 9mm ammunition. The optics-ready slide allows for the easy mounting of various optics, enhancing accuracy and target acquisition.Equipped with 3-dot night sights, the Springfield Armory Echelon ensures visibility in low-light conditions. The Springfield Echelon also features a threaded barrel with a 1/2x28 thread pattern, allowing for the attachment of muzzle devices such as suppressors. The Central Operating Group and VIS Optic Mounting System further enhance the pistol's versatility and functionality.Springfield Armory Echelon SpecificationsManufacturer: Springfield ArmoryModel: EchelonFamily: Echelon SeriesType: Semi-Auto PistolAction: Striker FiredCaliber: 9mmFinish: Black MeloniteFinish Type: Applied FinishFrame: Polymer FrameStock/Grips: Black PolymerBarrel Length: 4.5"Overall Length: 8"Rate of Twist: 1-in-10Capacity: 20 + 1Number of Magazines: 5Magazine Description: 4-17 rd. and 1-20 rd.Sights: 3-Dot Night SightsSight Type: Night SightsOptics Ready CutThread Pattern: 1/2x28Special Feature: Threaded BarrelWeight: 23.9 oz.Case: Springfield Range BagAdditional Info: Central Operating GroupAdditional Info: VIS Optic Mounting System