AR-10 Optic Mounting: Rings vs. One Piece? Height?

gunsandgear

New Hide Member
Feb 17, 2018
16
2
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#1
First of all, thank you for the responses to all my questions over the past week, this forum has really helped me out.

I finally decided on an optic but now I need some advice on a mounting solution. I am looking to mount a T5xi 3-15 (34mm tube, 50mm objective) on an AR-10. Please let me know what other information would be useful.

Questions:
1) Rings vs. one piece mount?

2) What height rings or mount? I ideally want an additional 20 MOA of elevation. Currently have a SOPMOD stock on the rifle, not adjustable for height.

3) Anyone have pictures of their similar setups (with the corresponding information)?
 

gunsandgear

New Hide Member
Feb 17, 2018
16
2
3
#3
I like that ADM Delta mount, but I don't think I need the QD capabilities and my understanding is you can usually shave some weight by ditching the QD system. If QD vs. Non-QD doesn't make much of a weight difference then I am open to a QD mount for this optic.
 
Jan 1, 2014
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NoVa
#4
not even sure if you can have MOA built in with rings? but certainly with a mount you can get 10, 20, 30 moa which helps in reaching out to 1k and beyond. also since a mount has built in rings, shouldn't have any alignment issues, need to lap or whatever.

i have a couple of the nightforce unimounts and they work just fine. also a gg&g, ditto.
 

christopher.dow

I can use measuring things
Apr 28, 2017
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San Francisco, CA
#12
Have a look at Spuhr mounts. You can get them with MOA and they have an amazing leveling system. There’s a cant level built in, and you can mount a cosine or angle indicator on the side. They make lots of mounts that will work with a flat-top rail.

I’m buying them from now on.
 
Last edited:
Likes: Henok
Feb 17, 2018
16
2
3
#13
For those who refer to this thread in the future: I went with a Nightforce Unimount (p/n A194): 1.44", 20 MOA, 34mm, Extended Unimount to mount an optic with a 50mm objective on a flat top AR-10. I will report if there are any issues.
 
Likes: skierhs
Nov 30, 2012
1,290
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Black Forest, CO
#14
For those who refer to this thread in the future: I went with a Nightforce Unimount (p/n A194): 1.44", 20 MOA, 34mm, Extended Unimount to mount an optic with a 50mm objective on a flat top AR-10. I will report if there are any issues.
Just an FYI, the large frame uppers (AR-10) are typically large enough you can use a standard mount (non-cantilever) and still have enough room forward for your scope. I have used ARC M10 QD-L mounts with my large frame AR's and have been fine. I am also considering going back to the Badger 22 MOA riser with low rings on my next build...
 
Feb 17, 2018
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#16
Just an FYI, the large frame uppers (AR-10) are typically large enough you can use a standard mount (non-cantilever) and still have enough room forward for your scope. I have used ARC M10 QD-L mounts with my large frame AR's and have been fine. I am also considering going back to the Badger 22 MOA riser with low rings on my next build...

I appreciate the information. I went with the cantilever because I didn't want to have the mount touch the rail on the forend of the rifle. Either way, besides my LT-104 it's my first "high end" mount for a variable power optic so I had to start somewhere. I'm looking forward to either enjoying this mount (hopefully) or at least learning what I don't like(y)
 
Nov 30, 2012
1,290
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Black Forest, CO
#17
I went with the cantilever because I didn't want to have the mount touch the rail on the forend of the rifle. Either way, besides my LT-104 it's my first "high end" mount for a variable power optic so I had to start somewhere. I'm looking forward to either enjoying this mount (hopefully) or at least learning what I don't like(y)
That's what I'm saying, the large frame AR's are large enough to put a standard non-cantilevered mount and not hit the handguard, the image below shows an ERA-TAC mount on top and the ARC M10 QD-L on bottom, neither went all the way to extend beyond the upper receivers top rail...

 
Jan 31, 2018
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South Texas
#19
First of all, thank you for the responses to all my questions over the past week, this forum has really helped me out.

I finally decided on an optic but now I need some advice on a mounting solution. I am looking to mount a T5xi 3-15 (34mm tube, 50mm objective) on an AR-10. Please let me know what other information would be useful.

Questions:
1) Rings vs. one piece mount?

2) What height rings or mount? I ideally want an additional 20 MOA of elevation. Currently have a SOPMOD stock on the rifle, not adjustable for height.

3) Anyone have pictures of their similar setups (with the corresponding information)?
Are you planning on removing the optic often?

If so, will it be moved around or only on one gun?


If you will be removing it for whatever reason (travel, storage, etc) AND keeping it on the same rifle, a one piece QD would be ok.

If you remove it often AND switch the optic onto different rifles, a non QD is best, imo. You'll have to continually adjust the QD for each rifle.

Either way, I'd recommend a regular spuhr mount. Easy to quickly mount.

I'll get some pics up in the next week or so.
 
Feb 10, 2013
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Minneapolis
#22
a cantilevered mount is only to solve an issue with eye relief related to your mounting location. if you need a cantilevered mount use it, if you don't don't. they add weight and move the scope away from the mounting surface on your rifle, never an ideal scenario.
 
Feb 17, 2018
16
2
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#23
a cantilevered mount is only to solve an issue with eye relief related to your mounting location. if you need a cantilevered mount use it, if you don't don't. they add weight and move the scope away from the mounting surface on your rifle, never an ideal scenario.

The place I ordered from has no restocking fee, I could just return the A194 (1.44", 20 MOA, 34mm, Extended) and get the A257 (1.44", 20 MOA, 34mm. non-cantilevered). Is it worth it to do so? The amount the A194 extends forward is slight but if it is completely unnecessary I would not be opposed to swapping it out.
 
Feb 10, 2013
92
4
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Minneapolis
#24
that is entirely up to you - buy the mount that fits your need, I'm not in a position to prescribe anything other than very vague (internet) advice. offset is simply to make your desired optic fit your mounting surface when it otherwise wouldn't.