[wilekcmc]

So the mechbox is a V3 with a micro switch, right out of the box there was an issue of semi auto firing. The reason for this was the mechbox was over shimmed from the factory so it would not cycle properly. Other issues with the mechbox:

Piston Head would not allow the O-ring to expand, the holes in the head were not cut all the way thru
Cylinder Head Leaks
Air Nozzle Leaks
Metal Spring Guide with washer

Good Points of the Mechbox:
Good Piston All Metal Teeth, already had the second tooth removed
All Steel Gears
Quick Change Spring Guide

Upgrades to the Mechbox:
Matrix CNC Aluminum Air Nozzle for H&K Umarex G36 / UMP Series Airsoft AEG Rifles
Lonex Complete Internal Upgrade Series Enhanced Cylinder Set for MK36C Airsoft AEG Rifles - Mushroom Type