Interesting AEG piston head design

It has arrived. It looks super well made. Let me find a gearbox to put it into.

 
First try: it indeed fully seals between the two O rings, even just by pushing it in by hand. There is an air cushion of about 6-7mm. This would break the piston or the gear on the second shot.

I removed the small O ring and there is a noticeable resistance when pushing it in by hand and covering the nozzle, but that didn't make much difference to the impact sound. The gearbox cycles fine like that though.

I'll check with smaller O rings that won't seal perfectly.

 
Samurai said:
First try: it indeed fully seals between the two O rings, even just by pushing it in by hand. There is an air cushion of about 6-7mm. This would break the piston or the gear on the second shot.
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hmm, this is what I thought might happen! I must be scientist alpha foxtrot ? 

One question though ... ehm...  did you use lube? ? 

 
Angel made something similar - waste of time really.

 
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