The Umarex (Elite Force) Smith & Wesson M&P R8 is a faithful replica of the Military and Police model. This airsoft revolver is made of polymer and has an aluminum barrel, this is done to keep the gun lightweight and more budget-friendly. This revolver is CO2 powered, the CO2 cartridge goes into the grip, and there's is a button under the grip that opens up the CO2 compartment. The rear sight can be adjusted as well, for more usage instructions, check out this video:

The Umarex / Elite Force Smith & Wesson M&P R8 comes with 8 metal shells, since this revolver is made by Wingun, it can also take most Wingun-made airsoft revolver shells. Finally, the R8 has a Picatinny under rail allowing you to add accessories such as lights and lasers to it.