I got a matech or ma tech or whatever rear sight and in the instructions it makes a big deal out of putting it in the rearmost slot on the receiver on an AR for the range adjustments and zeroing to work right. So my questions are: how does this rearmost slot on the AR line up with the XCR rail? and is it just a sight radius issue or a placement and radius issue? if it's just a question of radius then I just have to get the sight radius of the AR and space my sights the same but if it's a placement and radius issue then I need to know ho the receivers line up. Does anyone else use the matech BUIS? I read that they were only available to the military and couldn't find anything on their website. I was going to get the MI rear sight but then found the matech on ebay for like $50 and had to try it out. If anyone can shed some light for me I'd really appreciate it.
thanks.
jeremey
thanks.
jeremey