Mounting Huma Regulator Kit into Huben GK1

We wanted to help everybody that has a Huben GK1 but wants to have a regulated pistol. The normal GK1 pistols are unregulated.
With this Huma-Air regulator kit you can now shoot extremely accurate and consistent speeds!
Check it out on our websites:
airgunheaven.c...
For the Dutchies:
luchtbuks.com/...
Facebook:
AGH: www.facebook.c...
LB: www.facebook.c...
Instagram:
AGH: / airgunheaven_com
LB: / luchtbuks_com