Quoted:
Hmmm, is Eotech the same as HOLOsight?
Look at this link, I am confused now ---
http://www.arizonagunrunners.com/Products/Eotech/body_eotech.html
Also, I could not find a model 512, just 510 and 520.
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500 series which is the civilain model, it is slao sold under the Bushnell banner is the basic model. it only come with the hex screw, and it has a build in auto shut down of 8 hours.
510 series is the tactical model which has a protective hood, thumb screw, a bit different electronics and it has a programable auto shut off of 4 or 8 hours depends on the switch you hit when you trn it on.
550 series is the military model, it is the 510 series plus it has the new upgraded rubberized buttons, NV compatible, and it is dive capabile to 33 ft for 24 hours and 66 ft for a undisclosed period.
510 is a modle line, it contains the 511 and the 512. 550 series contain the 551 and the 552. the last number denotes the battery style, 1 is for N size and the 2 is for AA size.
Hope this helps.
Seabrook, I have an used by in excellent like new condition EOTech 511 for sale, would you be interested for 250 shipped?? This sight has only been mounted on a SR25k for pictures it has never used in field.