The Umarex Walther CP99 is a metal and polymer air gun with a good deal of metal components on the inside giving the Walther CP Sport a decent overall weight and heft. It's worth mentioning that the Walther CP99 has a full size drop out magazine for holding the CO2 cartridge that gives the air gun some additional weight and functionality. The German made fit and finish is very good on the CP99 and the plastic quality is also very good.