Hi.
Clean up gearbox, shim it. For snappier response add Perun AB++, set up precocking, it gives good triger responds.
If you need more speed, change gears to 13:1.
I have the same gun. It has ZCI inner barrel, Maple leave packing(bucking), Omega style
Nub, gearbox shimed and installed AB++. I am happy how it runs.
All parts bought from AK2M4