Teflon Tape Hopup Mod:
The goal is to improve hopup consistency by creating a hard stop before the nub.
It will also increase a bit FPS (just like you use Oversized O rings, it increase the friction between the shaft and bucking lip).
-Wrap it evenly, if you feel your bucking is bending to one side then stop and redo the wrapping.
-Don't wrap too much tape on or it will cause serious jams> Or to say, don't go too greedy.
-Don't expect to do it perfectly at first attempt. Sit down and Try it patiently for a few time until you find the sweet spot.