AR15 = Armalite Rifle 15. They are the ORIGINAL makers of the AR design. Every time someone says "AR" they are referring to Armalite. AR10 = Armalite Rifle 10 (.308 Winchester) and AR15 = Armalite Rifle 15 (.223 Remington).
If not, then send the info to one of the other guys on here. They'll snatch it up in a heartbeat.
I pick it up on Monday when he gets back in town. I know it's been fired a fair amount. How do I inspect for wear and tear vs abuse? He is a good guy so I doubt he's trying to screw me over on it. Just recouping the money he paid for it. He's got twins on the way.