I noticed something last night - there is a noticible audio change when simply flipping the gun from safe - to semi - to full auto while the gearbox is inserted and pins and grips are in/on.
Almost as if something is slightly grinding or rubbing - I noticed the change is noise is there 100% of the time when the aeg ceases.
I took a dremel to the end plate - still feels like the motor is in too far - for shits and giggles I built up some electrical tape on the bottom of the gearbox where the grip is screwed on - this actually changed things a bit - I was able to pop off some semi shots with a slight trigger pull (not fully pulling it back) although again flipping it to full auto would ceased it all once again - even the electricity to the motor stops.
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