I dunno about normal effectiveness. Whats the MOA of a target 100yds wide at a 1/4 mile?
Can we get a Cliffs Notes version? too small to read on my screen. (even after clicking the thumbnail)
Crowd control is not really about moa.. I honestly never shot with one, but like anything training can make improvements. AK variants spray like crazy running fast, and we can't deny their effectiveness in the field.
Cliff note is two models of braced black aces shotguns are now sbs, because an adapter was installed to put the brace on. Sounds like an argument that could be used for all non functional part mounted braces to be reclassified to sbr. The letter told the FFL to report all sales to atf for investigation.