If it were Aus you were asking about, it would be an easy Q.
Everything in the top picture, and all bar the Lee Enfield and the Mauser in the second pick would be illegal to own.
In the States, and I'm guessing here, it would be the 1944 M1 Garrand, and the 'riot' shotgun with the lug on the barrel for attachments that would get you in trouble.
Maybe the Ruger Mini 14 too, depending on how many rounds that mag takes.
Nice selection of weaponry there anyway Lazs, looks like they'd make for many a great day of can carnage.