Was at my buddy's house today after some flintlocking hunting in the morning. He was talking about his upcoming predator hunt and asked me a question that stumped me. I think I'm usually pretty good on regs. He asked if he removed the gas tube from his AR if it would be legal to hunt with. In case you don't know, removing the gas tube prevents the action from cycling semi automatically. It must be cycles manually with the charging handle, no differently than a pump or bolt action basically at that point. I don't know the answer to this. I told him that if he got field checked which he likely would if a wco saw it, he would have to explain and demonstrate the manual functionality to the officer. The gun is by definition no longer semi automatic (just has the appearance of it). He has it set up with a nice tactical illuminated reticle scope and has a bipod on order. Is he correct?