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I have never heard of this bro. I have used the same set up on my SR since I got it, and I'm using a PSG1 length barrel covered by a silencer. No fps reduction.
I also have a silencer/suppressor on my APS2, and with or without it installed the APS2 shoots the same fps.
But the only thing I could possibly think of that would affect the fps is that if the barrel length is matched to the cylinder, there is no ported piston head, and you install a barrel extension silencer/suppressor, is that you might end up with suck back on full auto....if the inner diameter of the barrel extension is the same as the inner barrel of the AEG. But even then, you are talking extreme odds of this happening.
So yeah, could someone explain the physics behind this "main stream" thinking??
SHA DO
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