[MHGinTN]

Converting 1022 rifles to full auto with open bolt is easy, though a silly waste of ammo. You have to destroy the firing pin/bolt to do it, and alter the trigger mechanism irredeemably.

[Dead Corpse]

M1 is a lot easier... Shoe string with loops tied on either end... Someone even registered one as an NFA item. Has a tax stamp serial tag on it.

Keep it legal kids... Unless you are ready to have that Thin Blue Line turn into a Thick Blue Wall falling on you.