The guns both cost about the same so it is a fair trade if they are both in good condition and working order. Also a lot of members here ignore posts of people who are brand new and haven't posted in the intro section, so go on down and do that. Also welcome to the forum.
I'm gonna stop you right there, you just said an AR-15 is a high-powered rifle. It is obvious you don't know anything about guns and I shall ignore anything you say from this point on.