Sig Sauer Sig1 MPX Airsoft Features The SIG MPX is one of the newest and best-looking submachine guns on the market. Now available in a springer format. The gun is all-polymer construction and a single shot. Pull the charging handle to load and cock the gun. The stock is adjustable with 3 different positions and removable so it can be used as an oversized pistol. Sig Sauer Sig1 MPX Airsoft Specifications Overall Length: 25 Inches Weight: 1.75 Lbs Muzzle Velocity: 300 FPS Color: Black Magazine Capacity: 26/500 Rounds Package Includes: Magazine Gun Removable Stock Manual Removable Retractable Stock Picatinny Top Rail And Front Handguard Functional Cocking Charging Handle Flip-up Rear/front Sight Polymer Construction