Swamp Donkey, do you happen to have another one of those MK-3 mirrors? I have been looking for one for 3 years! thay were only supplied to the military and are rated one of the best mirrors. 3x5 is a tad big to me, 3x4 is a good size to me. <snip>
Good news - the company (Howard Glass) that makes the military issue MIL-M-18371E glass signal mirrors with retroreflective aiming grids does sell to civilians through distributors. See Doug Ritter's article:
http://www.equipped.org/phony_signal_mirrors.htmto read more about this and find distributors (Doug gives links at the end of the article).
Bad news on the size, though. AFAIK (and I know a lot about this) the military issue MK-3 mirrors have only been made in two sizes: 3"x5" and 2"x3". Doug has Mil-Spec MIL-M-18371E linked to his article, and you can see in the preamble here:
http://www.equipped.org/pp/pic2038.htm#1that 2"x3" and 3"x5" are the two sizes. I also have copies of versions B & D of this spec - version B had only the 3"x5" version. Of course, you could cut a 3"x5" down to 3"x4" if you were careful about it.
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