Umarex Glock 17 Gen 3 Original Hop-Up Set (# G173-12)

Umarex Glock 17 Gen 3 Original Hop-Up Set (# G173-12) Metal Construction Design For Replace the Orignal Parts Suitable For Umarex (GHK) Glock 17 Gen3 Series Airsoft Gas Blow Back GBB Pistol Airsoft Guns