Well look at that. You nailed it. Looks especially like the one they made for SilencerCo.
I'm actually enjoying these designs, but I understand where you're coming from. I would bet it's just easier to go this route, than cramming blank-firing stuff into those designs. At least they covered up most of the pic-a-tinnys
Yeah, I meant cramming them into the Seburo designs. What they've ended up using is much more practical from the standpoint of retro-fitting existing firearms.