Yeah Kona is probably right, let’s people use what they want and avoids unnecessary ATF shenanigans. The SBA3 is an adjustable brace for buffer tubes. The Tailhook is also super popular. SB tactical made a collapsable brace too.
This could honestly be it’s own thread, but I imagine something that utilizes the little tabs in the back and ends in a short mock buffer tube (possibly in multiple lengths, or with optional extenders for less adjustable braces) would be a relatively simple and let people pick their favorite.
I’m happy with my CP33 as is, but would strongly consider an alternative build with a brace. I bet it would look amazing with a suppressor.
(Separate note–Kel-tec is missing out by not making a braced/short barrel CMR30)