The newer Aimpoints do not come with mounts. The older ones came with a mount that was about worthless. Unlike some things, the so-called "aftermarket" mounts for Aimpoints are WAAAAY better than the "factory" Aimpoint mount.
There's any number of good mounts and backup iron sights you can get made by a variety of companies. A slick new modification has been made to one of the all time favorite mounts, the ARMS #22M68. Get it with the extended spacer and you can forward mount the aimpoint which is a great advantage.
A favorite back up iron sight is the ARMS #40, it is spring loaded so it cant ever be knocked down. Whats even better, even though these two pieces are among the favorite accesories, they arent the most expensive and they are readily available. I suggest trying
[url]www.sableco.net[/url] or
[url]www.mstn.biz[/url]
Each of these places will have the aimpoints, mounts and back up irons.