Springfield Echelon, Semi-automatic, Striker Fired, Polymer Framed Pistol, Full Size, 9MM, 5.28" Threaded Barrel, 1/2X28 Thread Pitch, Melonite Finish, Black, Optics Ready Slide, Tritium 3 Dot Night Sights, 2 Magazines, (1)-17 Round and (1)-20 Round ECT9459B-3D • Double Action USA Action Trigger System) • Capacity: 17+1 and 20+1 • Finish: Black • Sights: Tritium 3-Dot Sights • Barrel length: 5.28 • Overall length: 8.8 • Variable Interface SystemsCentral Operating Group VIS Optic Mounting System • Action: Striker Fired • Capacity: 20 + 1 • Finish: Black Melonite • Sights: 3-Dot Night Sights • Barrel length: 5.28" • Overall length: 8" • 15in Free-Float MLOK Rail/ Ambi Bolt Release