Umarex - Glock 17 Gen 4 GBB (Co2) - Black ARP9 Upper Receiver

Upper Receiver

The Springfield Armory XDM (X-Treme Duty

it looks mostly like the Mark III since the barrel is fairly stout but it does not have the typical taper near the charging handle area

Magpul M4 magazine compatibility

Quick Spring Change System

Umarex - Glock 17 Gen 4 GBB (Co2) - Black ARP9 Upper ReceiverA full licensed Glock 17 Gen 4 by Umarex VFC This is the Gen 4 version of the iconic Glock 17 , in real steel it still fires 9 mm rounds, and this licensed Glock 17 shoots 6 mm pellets which exit the barrel with a maximum energy of 1 joule. The Gen4 has a number of differences over the Gen3 Glock 17 in real steel but in Airsoft it comes down to the following changes. New interchangeable Backstrap options, and a slimmer pistol grip profile, the Glock