FROG ENGINEERING HOP UP FIX FOR VFC HK417 GBBR GEN 2 (AND GEN1)

See video below to understand how to assemble the parts to your VFC HK417 GBBR to improve hop up performance and increase range!!! All parts printed with simple materials, have to be stiff and strong - PLA is good choice. Do 3 outlines, will be fine.