specification CALIBER 4.5mm(.177)/5.5mm(.22) VELOCITY Cal 4.5 0.55g pellets 700fps,approx 25 shots at full power Cal 5.5 1.0g pellets 600fps, approx. 20 shots at full power RAIL 12mm dovetail CONSISTENT VALVE Yes WEIGHT 0.89kg TRIGGER adjustable trigger pull,1-5Lbf L*W*H 370*35*130(mm) SUPPRESSER Integrated FILL PRESSURE Max.24MPa