The Bavarian Shooter goes over the VFC Glock 17 Gas Blowback pistol, which is made for Umarex, and checks it if it is something to recommend for training... "The brief presentation of the airsoft version of a Glock 17 in caliber 6 mm BB. The pistol works according to the GBB principle, i.e. it is operated with gas and thus guarantees a largely realistic function."