Sig Sauer

One Piece Aluminum Upper With M-Lok - Timney Single Stage Trigger - 20rd Poly Mag - Ambi Controls - 4.5 Threaded K Barrel - CALIBER 9MM - FRAME MATERIAL: ALUMINUM - FRAME FINISH: ANODIZED - BARREL MATERIAL: CARBON STEEL - BARREL FINISH: NITRIDE - MAGAZINE CAPACITY: 20 ROUNDS - SIGHTS: OPTICS READY - TRIGGER: TIMNEY SINGLE STAGE - OVERALL LENGTH: 22.3 in - OVERALL HEIGHT: 8 in - OVERALL WIDTH: 2.4 in - BARREL LENGTH: 4.5 in - BARREL TWIST: 1:10 in - WEIGHT W/MAGAZINE: 4.6 lb