Type: Pellet Rifle. Manufacturer: Sig Sauer ASP Model: Sig Sauer MPX ASP Materials: Metal and Nylon Fiber build. Weight: 7 Pounds (3300 Grams). Barrel: 8 inch steelrifled. Propulsion: 88 or 90 Gram CO2. Action: Semi Auto,double action only. Ammunition Type: .177 caliber pellets. Ammunition Capacity: 30 rounds belt fed. FPS: Up to 600 fps (When shot by a Unicorn) I have been waiting to get my hands on the Sig Sauer MPX ASP .177 Caliber Pellet Rifle for some time now and the wait has been worth it for sure. There are really no other guns out there right now other than perhaps the Umarex CX4 Storm that compare to the Sig Sauer MPX ASP .177 Caliber Pellet Rifle and even so I feel the Sig Sauer MPX is by far the better of the two CO2 Air Rifles. OK so the MPX does not really come close to hitting 600 fps but did you really believe that in the first place? Still consistent 450 fps from a decent grain lead pellet is about what you would expect from a short barreled CO2 rifle. If you do want more fps then look at the MCX with over double the barrel length of the MPX, this will easily get you an additional 100+fps for those of you who thrive on velocity performance. I am fine with 450-500 fps since this is all that is needed to accuracy shoot and nock over most targets at a variety of ranges. Read full article here: https://www.replicaairguns.com/2016/5/21/sig-sauer-mpx-asp-177-caliber-pellet-rifle-