What a dumb horses butt....
Criminals will just carry more clips/magazines or they will carry more weapons on them....
Not to mention anyone with decent sheet metal working rigs will be able to create/modify new high capacties and those people will of course be criminals and won’t give a crap about breaking slow joe’s laws...
there are many like him. Senile fools who would gladly trade principle for self interest.
the ability to limit capacity in the era of 3d printing and cdc fabrication is looooooooong gone.