Eotech 512 vs 517

Tactical Gear Optics & Mounts
1

I have a flat top AR that I want to pick up an Eotech for. This is just going to be a relatively inexpensive, starter optic for me… So, I was going to pick up a new 512 for around $430 after tax.

Question is, I was scrolling through some local classifieds tonight and found a used 517 with a manufacture date of 9-08, that I can pick up for $400… should I consider this if it is in good shape. I had a hard time finding what advantages the 517 has over the 512, besides the control being on the side. I don’t plan on magnification or night vision, by the way.

Is the 517 much of an improvement?

2

absolutely, The model 517 is the same exact thing as the 557 except for the NV and Bullet drop compensator, it has a standard A65 reticle, side button operation and a 7mm raised base, for 400 that a pretty good deal, I would try and work it down to 350 though, I have the 557 and its AWESOME, i bought it with the 3x magnifier(MPO) othrwise I would have bought the 517

3

Plus, the 517’s mounting crossbolt is stronger/better designed than the 512’s.
Tomac

4

Does the raised base of the 517 make for a lower 1/3 co-witness?

5

yes it does

6

when I put this Eotech on, I will have flip down sights front and rear… it seems to me that a lower 1/3 is less desireable for being able to use back up sights with, as you wouldn’t have much of a lower field of view with them. Am I right?

7

There’s a lot of personal preference involved but I prefer a 1/3 cowitness w/the Eotech.
Tomac

8

Thanks for the input guys… I went with a 512. It’ll make a good starter optic that I can cut my teeth on, and eventually move up to an ACOG, etc.