Quote:
Originally Posted by Freeze
When you say o-ring did you mean the piston head o-ring? I had a similar problem on my SCAR and replacing that made my FPS hit 360 with a 0.2g bb on a M100. I tried stretching it at one point, but that only lasted for a week and then it was back to garbage compression. I went with the Blackblitz X-Ring, works wonders for me.
My current M4 is running full SHS compression parts with a Blackblitz X-Ring, SHS 12:1 gearset, Modify M100, and gives me 370 +/- 2 FPS on a 0.2g bb. My setup isn't short-stroked though so that may make a difference (I'm not sure about this)
I'd suggest a full run down on every connection point in your compression parts to figure it out. Do it before you try to fix anything.
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I have a port on my cylinder, may be this... However, I am unsure if the piston goes back that far to actually USE the ports. Going to try this possibly if it may be it, but I ordered 100 piston head o rings off amazon for $18. Will rule these two out if it changes nothing.