Umarex Glock 17 Gen 3 Original Hop-Up Rubber (# G173-16)

Umarex Glock 17 Gen 3 Original Hop-Up Rubber (# G173-16) Rubber Construction Design For Replace the Original Parts Suitable For Umarex (GHK) Glock 17 Series Airsoft GAs Blow Back GBB Pistol Airsoft Guns