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9/19/2017 7:27:10 PM
Posted: 2/18/2006 4:35:21 PM EDT
I just purchased my first ar. Its a stag and the upper came with an eotech holo sight. I am trying to identify it. It is either the 552 or the 512. How do you tell the 2 apart? i can provide pictures it it would help thank you.

Link Posted: 2/18/2006 5:01:02 PM EDT
[Last Edit: 2/18/2006 5:36:01 PM EDT by bf2]
The 551 is about an inch shorter, but if you open the battery compartment you will know soon enough. The smaller batteries, or N-Type 1.5 v ( Do Not use the similar size 12 v or you will most likely fry it and void the warranty of 2 years ). The model 512 has AA batteries.

551 = N-Type 1.5v batteries
512 = AA batteries


Edit: I had 552 listed earlier, both the 551 and 552 also have a button that says NV ( Night Vision ) and I believe has 10 NV reticle settings and 20 settings for normal daylight.
Link Posted: 2/18/2006 5:27:59 PM EDT
I believe both the 552 and 512 are the same dimensions with the same AA batteries. Since the 552 is night vision compatible it should have the "NV" button in the middle of the control panel.
Link Posted: 2/18/2006 7:56:03 PM EDT

they both look exactly like this the only difference you will notice is that on the 552 the middle button will have NV on it and when you push it, it will dim the reticle for NV use
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