Well this one works fine for me: http://www.aimsurplus.com/product.as...ver&groupid=11

It's only $59 and must be shipped to a local dealer. It's nothing fancy so if you're into that kinda thing it might not be what you want.

On another note: I got a 22lr conversion kit today. Can't wait to try it out (neither can my wallet). Also got the Magpul MBUS rear site. Like it so far. Need to do some sighting in (although it should be close cause I bore sighted it already).