Beyond the Second Amendment (which the 1968 Gun Control Act trashes anyway) concerns, they might be better marksmen if they spent a little more time learning how to shoot rifles with conventional stocks.
These ignoramuses don't realize an M1A is more lethal than a scary black rifle (AR15). It has a more powerful cartridge and greater effective range.
The general gov't has no Article I, Section 8 powers to infringe the 2nd amendment in any way. It trumps any Article I, Section 8, Para 2 "penumbra or emanation" that might be perceived as a power to regulate firearms. The 2nd amendment was passed AFTER the body of constitution and superceeds anything in the body of that document.