I don't know anything about the scope but by golly it looks impressive!
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I'm still looking, but found these:
http://m4carbine.net/showthread.php?t=31872
http://www.longrangehunting.com/foru...6-ssg-p-61753/
Suwanee, Leupold does make a 1-8 optic:
https://www.m4carbine.net/showthread.php?t=53841