Board Thread:Off Topic/@comment-26397825-20170714130723/@comment-27144409-20170811022415

You don't need a special barrel or blanks to fire rockets from the muzzle. Say hello to Simon Breaching system. That's not enough to count as artillery.

As for making a full auto barret, that might be classified classified as a machine gun, not a battle rifle, but I could be wrong. What kind of ammo capacity did you have in mind?