And one thing I think effects it, all these pistols and SBRs made from rifles. They were gonna do a PSL in a pistol a while back, if done there would have went that surplus ammo. The maker actually recanted and destroyed the prototype due to the uproar it caused.
Yes, the pistols are how they are legally justifying the proposed ban.
Regarding the PSL, a DMR rifle converted to a pistol length begs the question WHY?
Makes about as much sense as trying to make a sniper rifle out of an M1 carbine.