lol Burris sells a 3 power scope you stick behind the Burris fast fire red dot optic for magnification and it can flip down out of the way when you don't want magnification bubby.
Ordered one of these primarily for my AR .410 upper with a seperate UTG high profile riser mount. Reviews seem basically good compared to certin Aimpoints when you talk $. http://www.burrisoptics.com/fastfire.html