Matrix 8mm Steel Bushing Set for 8mm Airsoft AEG Gearboxes

"I give this 6/10

Great quality bushing but i cant tighten my gearbox shell all the way without it locking up my gears. Took out the shims and only slighty tighten the screws so the gears can move.

It could be my gearbox. Echo 1 V2

"The bushings are the right material, and they fit the gearbox. That's where the good stops. If you're going to buy these, be prepared to sand them down. After taking more than 0.020" off of them, they are still far to tight of a fit.

If you have a belt sander, these will work just fine.

"Pros: Good quality.

Cons: Very high profile. (Causes even some loose gearboxes to be very tight)
Hard to shim.