GHK/ Umarex PDW Hopup Bucking

thingiverse

I made a Replacment Hopup Bucking for the Ancient GHK/Umarex PDWs! I recommend Printing the Bucking with the Thin Side down, Using Normal Supports, with a Skirt. I printed it with PLA, and it has held up well ever since. The Ring is for Securing the Hopup Nub, in my Experience the Stock Rubber Ring does not provide enough Hop. If you need more Hop, just add stuff underneath the Ring. Id also reccomend using a new Hopup Rubber, as the Stock Rubber is not really good. In my Airsoft Rifle it hops 0.20 BBs very well.