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2/4/2016 3:16:59 PM EDT
Looking at a new in the box 512 on a local trading site.







It does not have the "F" on the side of the hood. What does that mean?



Does this model co-witness on a flattop AR?
2/4/2016 3:22:13 PM EDT
[#1]
That's one of the later model 512s and doesn't have the F moniker, AFAIK. You can tell it's a later model due to the cutout under the front battery cap.
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