First a semi-auto is not an assault rifle. The def of an assault rifle is an auto weapon which is already illegal in the US unless o e purchases a special license which is expensive and already has an extensive background investigation to get. It is not a military rifle, an AR is not used by our military our military uses the M-16 which has three firing positions, full auto, semi auto, and burst. An AR dies not have any feature like this it only fires semi-auto what does this mean one trigger pull one round. If a person has gone through a background check I do not have A problem with an 18 year old owning! If they can fight for our country I believe non of their rights should be impenged upon including alcohol. Do I think they should, no but I don't believe our govt should not be involved.