Many owners have reported a misalignment on their barrel treads, also, the way the silencer adaptor sits pressing straight on the slide, agravates the problem if the barrel is also not 100% straight aligned (any gun needs a bit of adjusting on the rear sights, but the way the silencer is put on by design is a problem here).
I come with a 3d printed silencer + mod that solves that, so you can finally use a silencer, also the model now have a filling port dust cover and some nice add-ons.
Instructional video on how to correct the misalignment (more like adapt the silencer to deviation):
Silencer (also loading gate):
/https://fbi.cults3d.com/uploaders/28252019/illustration-file/1ffd9f34-5ca4-469f-aebf-5fed1012035e/IMG_20240112_001704.jpg)
cults3d.com
Mod for faulty treading/barrel misaligned guns:
/https://fbi.cults3d.com/uploaders/28252019/illustration-file/592b4ab3-bf55-4c48-a448-67a1dcb2d3e8/GK.jpg)
cults3d.com
I come with a 3d printed silencer + mod that solves that, so you can finally use a silencer, also the model now have a filling port dust cover and some nice add-ons.
Instructional video on how to correct the misalignment (more like adapt the silencer to deviation):
Silencer (also loading gate):
Huben Gk1 Loading gate + custom Silencer + filling prove dust cover + tread cover
Check your local gun laws before print airgun parts. https://www.youtube.com/watch?v=wtnHISmYA08 A alternative loading gate and a moderator/silencer for that fantastic air pistol. Just messing around with my Gk1. BEWARE! check if your printing bed is perfectly aligned and the vertical axis...
cults3d.com Mod for faulty treading/barrel misaligned guns:
Tread correction for GK1 silencer+Tread and dust cover FREE
Main mod: https://cults3d.com/es/modelo-3d/variado/huben-gk1-loading-gate-custom-silencer Some users have reported that their Gk1 treading are misaligned, so any moderator/silencer that they put on is altering the point of impact of the projectiles. That con also happen if the barrel is not...
cults3d.com 
