One of the licensed Glock Pistols to Umarex is the pistol that started it all, the Glock 17 and here is their presentation of the Umarex Glock 17 Gas Blowback Pistol... "This is the grandfather of the GLOCK pistols, the model that came at the very start. The original fired 9-mm rounds, and this licensed replica shoots 6-mm pellets which exit the barrel with a maximum energy of 1 joule. If you want to see what made this weapon such a classic, you can strip it just like the original. The heavy metal slide is visually impressive and brings the weight up to a hefty 650 g. Thanks to blowback and an adjustable shoot-up, you feel like you’re shooting the “real thing”. The GLOCK 17 is a collector’s item and a must-have for all GLOCK fans."