It’s in the about section on his Odysee page

That makes sense, appreciate the knowledge.

The barrel block lock lock has similar dimensions to the barrel block lock itself. Since I don’t see it used in any of the guides, my guess would be it’s a modifier for blocking fuzzy skin in the area that the barrelblock lock goes, but that wouldn’t follow the naming conventions, so i’m not positive.

The other piece I can’t find at all. It resembles the mag release lock from the full-null imo, but it’s obviously more square and has that hole, which neither of the mag release locks have.

What version are you building and do you have the most recent files? I don’t think either of those are needed, but would check with Justin his simplex chat just to make sure.