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The spring is a madbull M110. The motor is a stock High Torque motor that came with the CA Mp5k. The piston was the stock piston that came with the gun. (not an aftermarket)
This piston stripping only started happening after i upgraded to high speed gears.
The piston itself looks like all the pictures i've seen of Pre Engagement.. the pick up tooth was cracked off and several of the teeth before it were stripped. The second piston I added (another stock piston i had lying around) is showing signs of the same thing about to happen.
I don't want to stick a high end piston in this thing only to see it break like the previous two. I want to resolve the root cause of the issue which im pretty sure has to be per-engagement. I can say that the AOE is perfect.. (Sector is engaging at 12:00) I've got pretty good at setting up the AOE with sorbo pads. (i even added a small spacer on the piston head to bring it to exactly 12:00 sharp)
I never imagined i'd have to stick a M130 in this little gun though to be honest.. that seems pretty powerful for a small CQB gun like this? I get the loss of volume and what not.. but an M130 is what i need to return that piston fast enough to avoid pre-engagement? Seems excessive..
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