[Bashful]

First time touching the internals of an AEG(G&G A5). Recently took the inner barrel and hop-up unit out of the gun and then stripped the bucking off to clean the barrel. Upon re-assembly, I lined the groove up, reinstalled the bucking/clamp/bushing and up re-installed into the hop-up and then the gun. 200rounds later it is shooting predominately to the left, yet still keeping a 3" group at 30ft. anything after 50ft elevation is consistent, yet windage is extremely sporadic (range is inside)

My question is how would I correct the Shooting left problem, as well as longer range consistency?

Stock Barrel and Hopup G&G green bucking. shooting .20 g G&G BBs 390-405 fps

To note, out of the box the gun shot left, and required pretty sever correction on the installed iron sights to bring it to zero, but maintained that zero for 4000ish shots within 30-40ft (with the occasional flyer) longer range windage was always an issu