I'll check my nozzle when I get home tonight, I didn't see any cracks in it though. I have yet to take down my blow back unit but I will today.
I'm using a guarder FMK with a guarder outer barrel. Yeah actually the stock barrel was the first thing I removed so my outer barrel hasn't been stock for a while.
The slide isn't restricted in any way I can tell. When I fire it it seems very smooth and when I slowly let it forward it doesn't catch on anything. I'm thinking its poor sealing because I fired it yesterday with the stock spring and it got a few more rounds but still not as much as I would like (13 instead of 7).
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