M&P15 OR + PA Red Dot and 3x Magnifier question

[dou2bleTap]

Hi! I'm looking at getting this Red Dot and 3x long eye relief Magnifier from PA for my M&P15 OR. Also the kill flash.

The question I have is which mount to get and do I need the spacer? I want to cowitness with my ironsights (front is troy flip up and rear is matech flip up). I'm thinking I do need the spacer to fit both the red dot and magnifier. For mount possibly the PA QD flip mount standard height or ADM?

 

[BillyJack2012]

What spacer are you referring to? Something for height or something to ensure enough room on the flat top?

Do you need or really want the multi-retical? If not, I'd go this route and get the cantilever mount. It's made for lower 3rd co-witness and allows you to add a magnifier behind it.

https://www.primaryarms.com/Primary-Arms-30mm-Red-Dot-p/primary-arms-30mm-red-dot.htm

 

[BillyJack2012]

Or check out this deal.

https://www.primaryarms.com/Vortex-Optics-s/587.htm

 

[dou2bleTap]

I heard back from PA and they said the spacer is only for the standard 3x and 6x magnifier. Not the long eye relief one I got.

I did see those other deals but I read so many good reviews about this red dot and magnifier that I went with it. I actually just purchased it an hour ago after getting ahold of PA on the phone. I also went with the American defense mount (ADM) instead of the PA one.