Sorry to disagree, but the amount of pressure exerted with even a minimal barrel restriction is exponencial to that of a completely free barrel. I have seen barrels literally split from as little as drops of water in them, (and no, the bullet doesn't simply push the water out). I've seen BFA plugs fly through multiple layers of plywood when testing a new installation for function.
I've blanked dozens of guns for re enactors., so I know a little about what I speak. The wall of a supressor coupling does not have to be that thick, since the counter bored hole that we are discussing would partially support the junction. Relatively modern suppressors are made of alumunum, Inconel and other substances that make them quite light.
Again, this whole affair is WAY over engineered for a simple BFA , which would be simply cut right into the barrel rifling.
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