My main question is, what would be the best type of baffle to use?
I'm hesitant with cones because I have never really heard a very good cone baffle with subsonic stuff. And monocores still seem to leave a lot to be desired too. Except for rimfire.
My plan is to build an integral can. In total about 16.5" long which will be housed entirely underneath of the handguard (the mlok handguard will be the outer body of the suppressor.
Will have a ported barrel. Possibly some reflex ports at the muzzle.
And it will not be on a semiauto either, which will eliminate ejection port noise, gassing and fouling. Basically, I plan to make it a bolt action side charged upper. And will also open up me being able to use a lot more powders that would not ordinarily cycle the bolt.
I will be working with my buddy on his quickload program to use fast burning powders that will burn out and achieve the full (desired) velocity before leaving the barrel. He has already shown me a potential load with about 7 grains of universal powder that I may try. That's a lot faster burn rate than the enforcer that I'm using on the blackout. And that's also with a 300 grain bullet too.
So, this is going to be a multifaceted approach to make the most quiet integrally suppressed upper that I can.
But, I don't have an idea of how to make the baffles. Whatever it is, would seem to be better than the bent and welded steel that the Russians use.

image from: http://www.sadefensejournal.com/wp/the- ... per-rifle/