AR-15 Pistol Question
I don’t know jack-squat about AR-15 pistols, nor do I have any desire to own one. However, I wonder what everyone wonders when they see AR-15 pistols. Unless I’m mistaken, they seem to be legal for the average gun owner to possess. Is there anything physically preventing a person from taking the pistol upper, and putting it on a rifle lower, or is it entirely reliant upon short barrel rifle laws to prevent people from making it into an SBR?