GHK AK Roulette

= GHK AK Roulette = Congrats! You've bought your first GHK AK. Before you sink money into your AK, you'll want to check your AK's receiver quality. If any of the below issues have befallen you, be sure to give this pin a react

Listed from critical items to QoLs, which happens to be chronologically ordered.

Misaligned front trunnion, jammed hop dial
Check whether your bucking is pinched and if the feed ramp screws are tight. You may notice that your feed ramp is not aligned with your hop unit. Your front trunnion is defective because GHK cut the hop unit alignment grooves or barrel threads too high/too low. Your nozzle and hop unit aren't level with each other causing feeding issues and there's no fixing this without unriveting the whole front trunnion. GAME OVER

Jammed hop dial
The cutout for the dial off-spec and isnt deep enough to seat anything other than the original plastic dial. Good luck filing the trunnion down since it's made of steel. @comradequiche's TDC mod is a workaround

Drooped/Saggy barrel
Your outer barrel may be drooping or in rare cases angled sideways. GHK cut your outer barrel threads at an angle, you'll have to compensate your aim

Wobbly stock
Your rear trunnion rivets are loose, shimming the "tail" of the fixed trunnion won't fix this as the play comes from the loose rivets pivoting off each other

Loose side dovetail
Your dovetail mounted optic ain't gonna hold 0 no matter how much you tighten the sucker down, loose riveting as with the rear trunnion

Nozzle valve spring QC
GHK used some cheap chinesium springs. Standard and 1.8J nozzle clocks anywhere between 1.2-1.8J.

Shoots <1J with any of the nozzles
possible cause is that the rivet holes for your front trunnion are punched too far out leading to a poor airseal