Nothing. It's a Bushmaster.
ETA: Sorry, that original response was probably a little snide. Bushmasters are terrible. I have been in classes where they just continue to jam regardless of the ammunition type, magazine type, or being bathed in lubricant. If you are trying to buy an AR just to have an AR, or shoot a few rounds at the range, then I guess it's fine.
If you are buying an AR to possibly defend your life or your liberty then I would look elsewhere.
Last edited by Serbonze; 01-24-2013 at 02:13 PM.