I want to throw one on my AR-15, but the local shops dont really have much in the way of a good sight
I bought an inexpensive reflex that has proven so far (9 months) that it's not cheap: an NcStar. I believe that the company is rebranding a sight that I've seen under a few different names. I have a few ARs and they sport Trijicon's ACOG and Reflex, an EOTech... and the NcStar. It started life as a red dot for my wife to enjoy a Sig 522. I liked it so much, and thought it was at a "what-the-heck" price point, that I bought one to stick on a DPMS .308 AR with a variable scope. The scope comes off, the NcStar on, for various shooting activities. I am a little embarrassed that such an inexpensive reflex has held up well, holds zero, came with its own "OK" mount (rail), has four reticles, selective brightness, and is easy on the battery (not replaced yet). I bought mine at Amazon--link below. (It’s available in black and silver. Also, check out the Amazon reviews. Three dozen people report and rate it 4/5 overall. Brace yourself--the black version is only $33.)
http://www.amazon.com/NcSTAR-Sight-TACTICAL-DIFFERENT-RETICLES/dp/B001COQOZI/ref=sr_1_1?ie=UTF8&s=sporting-goods&qid=1276709816&sr=8-1
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