Problem with A.O.E on Army L85

[airsoftguy]

I currently have a problem with A.O.E Angle Of Engagement meaning that the sector gear grinds on the first few teeth of the Piston causing wear for example that on full auto the gun makes a grinding noise when shooting.

[quadro]

you have to shim the piston head with some sort of spacer depending on how much adjustment is needed.