Need a rear flip up slight for AR. Which & Where?

[Northslope Nimrod]

I have a DPMS .308.

I am mounting a Powered Scope but I want a flip up rear sight for emergencies. (just in case scope breaks, loses zero and I need to use iron sights)

So, what is a decent but inexpensive flip up rear sight (aperture style) to mount on a picatinny rail? And where should I buy one? Remember, it is for back up so I don't want to spend $100. Much less would be great.

(my front sight is the high gas check style...if that matters)

 

[DnPRK]

The problem you will have is finding a slight that will fit under the scope when folded. The lowest rear flip up sight is by YHM.
http://www.midwayusa.com/viewProduct/?productNumber=519738

 

[HuntAndFish]

Well, here's the cheapest flip-up rear sight for ARs that I know about;

http://www.bravocompanyusa.com/Magpul-MBUS-Rear-Back-Up-Iron-Sight-Black-p/mag246%20black.htm

It's not metal, so don't tighten it up too tight. Not sure how low it is.

 

[Graywolf727]

Troy sights are awesome. They are pricey but well worth it.

 

[RT]

Troy or Magpul.

 

[madcratebuilder]

I have a usgi Matech, it's as low as any I have seen. It is in the range bag, never use it.