Umarex Beretta Elite II Kit is a perfect start for any airgun enthusiast This is the high-power model in the line of CO2-powered handguns. With its enormously high muzzle velocity it makes shooting 4.5 mm BBs lots of fun. And the price is surprisingly attractive. Operation is simple: Pull back the one-piece grip plate and insert a 12g CO2 capsule. The Beretta Elite II is a perfect entry-level model. It comes as a set with 250 BBs and protective shooting glasses.