[tunabreath]

Oh, should have mentioned. I tried all combinations of the stock G&G hop up unit and madbull ultimate with the firefly, stock JG, and madbull blue buckings. All still give pretty much the same FPS.

I'm using the stock spring guide, which has a washer that is about the same thickness as a bearing.

Cylinder and barrel are stock (so presumably matched). The cylinder is a type... 2? The minimum volume one (MP5K). The barrel is about 170mm
Out of interest, I tried using a KM 590mm 6.04 TN barrel, which yields... the same FPS (315 with the VFC spring).

The Element piston already comes with the second to last tooth missing, so I didn't remove any more teeth for correcting engagement with the sorbo in there.



I'm getting a really really really consistent FPS right now too, like strings of 4 or 5 BBs at exactly the same FPS. If I had a severe air seal issue (one which would cause a 40+ FPS drop), shouldn't my FPS be fluctuating quite a bit too? Or is it consistent just because the compression is good?