So I didn't buy this for function, I bought this for the looks because frankly I like suppressed things.
Looks nice, no visible seam on the top (or the bottom depending on your view, there is a visible mold seam on the reverse due to printing) and it gives a nice suppressed look to the Nexus Pro that I've mounted it on. I shoot mostly indoors so we do have a 100fps cap and I'm using the OOD spring cap reducer so that may factor into the equation, but using AF waffleheads, fakustrike shorts and even some of the AF bamboo shorts I'm getting weird dispersion patterns with some definite tumbling mid flight.
Which I guess is showing that it's sort of working but is giving me pretty poor dispersion pattern compared to stock, so I'm going to bore out the roughly one to two inch rifled segment. Aesthetics over function, but it fits pretty snugly with only a little play vs. the stock muzzle attachment which is all I want it for.