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10/30/2013 6:53:33 PM EDT
Got an old Eotech from a guy who inherited it.  Looks to me like the old 511, manufactured Jan 2001, has the old blister buttons and takes the N Batteries.  Any ideas? Am I right?

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10/31/2013 5:54:01 AM EDT
[#1]
Looks like it.  If you plan to use it, don't keep the batteries in it. They will drain.  It may also have a nitrogen leak & be dim in sunlight.
Eotech no longer supports it. Your on your own to fix it.
The 511 is the single biggest reason Eotechs have such a bad battery rep.
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