I think I need a riser (or taller rings)?

[glock_this]

Just got this from my buddy - my first (budget) scope. Clearly, these 7/8" tall rings do not allow for me to put the scope up over the BUIS and close up the eye relief a bit.



So, do I get taller rings - do they even make them taller - or do I have to get a riser and mount these rings to the riser then to the flat top?

As it is, I cannot see the front or rear BUIS when I look through the scope, so they are not in the way.. but it seems to me I am a bit to far away as the eye relief for this scope it about 3.9" and I am more like 5.5" (when stock in full length position)... just seems like it needs to be up higher and moved back over the rear BUIS.

advice please?

[Jicko]

Taller rings

$$$$$ option: Larue SPR mounts

$ option: burris tactical "high" rings or 1-piece mount

[glock_this]

cant spring for a Larue - not at this stage

I wonder if something like the RRA hi-rise mount would work?

if these are about 7/8" tall rings, seems like I need like 1.25" or so - Burris does not seem tall enough

[glock_this]

I am thinking maybe I could do something like the YHM-9490 mini risers to get 1/2" under the rings as it seems, finding actual tall enough rings is not that easy. 1" is like the tall side it appears and that will not do it on this scope.

[Jicko]

PM me, I have an extra YHM 1 piece riser.

[Ugly Dwarf]

I had to use the YHM mini risers like you pictured in conjunction with Warne X-Tall rings to get the scope to a comfortable height for my head / eyes.

I don't know if going this high will allow the irons to co-witness with the optics (or if that is part of your intent).

[glock_this]

I had to use the YHM mini risers like you pictured in conjunction with Warne X-Tall rings to get the scope to a comfortable height for my head / eyes.

I don't know if going this high will allow the irons to co-witness with the optics (or if that is part of your intent).

not worried about co-witness.. just want to pick the scope up over the rear BUIS and move it back a bit

did you find the mini risers to be stable enough? any photo of it mounted with rings?

[kazman]

ARMS #22 High (about $115) work well over my ARMS 40L BUIS. But you'll need 1" to 30mm converter which adds to cost. I like to practice with both irons and scope so the quick release levers are great and return to zero is very reliable. I looked into YHM risers or rail extenders but opted for the ARMS.

[Ugly Dwarf]

did you find the mini risers to be stable enough? any photo of it mounted with rings?

It's very stable. No pix to post.

[glock_this]

I will likely do the YHM mini's - cactustactical has them

but I like this idea also IF QD mattered

[glock_this]

thanks to Maxicon, I read his entire thread on 1 piece mounts out there, and I think I may be

This scope has about 3.2" tube to work with (clamp space). I need about +1.65" to centerline to clear the rear YHM BUIS.

So, in looking at his options, and keeping it affordable at under $80 or so.. I see nothing that would work

Burris PEPR = the rings are to wide edge to edge to fit in my 3.2", plus it claims only 1.59" to center line

Model 1 Sales M1S = the rings 'look' to be to wide edge to edge to fit in my 3.2" but I cannot find measurements to be sure, it claims a 1.75" to center line.. great

CCA DVSR = the rings are to wide edge to edge to fit in my 3.2", plus it claims only 1.58" to center line

ProMag 1-piece = the rings are to wide edge to edge to fit in my 3.2", but it claims a 1.68" to center line.. close

Wilson Combat = the rings are to wide edge to edge to fit in my 3.2", but it claims 1.65" to center line.. close but no dice

[maxicon]

Yeah, welcome to the world of AR optics.

There was someone on arfcom recently with the same problems - he had a compact scope that looks a lot like this one, and was having a hard time fitting it. This is one of the drawbacks of one-piece mounts - ring spacing isn't flexible.

Most people want the scope centerline to be at the iron sight height (1.4" above the rail) or a little above, though sometimes more height is needed to clear the rear BUIS, like in your case.

Sounds like a riser or extended rail under the rings you have would be the best bet. Most of them add 0.5", so you'd still be a little low. AR height rings with a riser would do the trick - the scope would be a bit high and cheek weld could be tricky, but it would work.

Unfortunately, many of the more affordable AR height rings, like the Burris XTR ultra-high or Millett AR15 rings, are extra wide.

Warne makes ultra-high AR height rings that are good and not too expensive, and Millett makes their Angle-Loc rings in an AR height now (AL00722), but they have windage adjustments, which I don't care for on an AR rail. Note that Millett and Burris spec to the bottom of the ring, not the centerline, so you have to add 0.5" for centerline height on 1" rings.

http://www.opticsplanet.net/millet-angle-loc-weaver-style-smooth-1-rings.html

http://www.opticsplanet.net/warne-1-quot-aluminum-ar15-flattop-rings-48791.html

For rails, RRA makes an extended rail that's a bit higher, at 0.67", but it doesn't leave room for a BUIS. Millett also makes one that's 0.625" high, but I don't know much about it.

Likewise, Brownells sells a multi-height riser system that has a variety of height options, but no extra forward offset:

https://www.brownells.com/aspx/ns/store/ProductDetail.aspx?p=23115&title=AR-15/M16/M4/CAR-15/AR-10%20MODULAR%20FLATTOP%20RISER%20MOUNT%20SYSTEM

Here's an example of rings on a YHM extended rail - this is lower than you'd want, but that can be tweaked with different ring heights.

[glock_this]

Hey thanks...

couple questions... looking at my setup, should I even address this? I 'think" I should as it seems eye relief is to far IF I go by measurements, more so when the stock is fully deployed, as I reported in my first post. But I am not 100% sure being 6" away (when they claim 3.9") is a bad thing? Also, wanting to get above the BUIS seems like a logical need, but maybe not? I wonder if, in the end, I raise this up above the BUIS and try to move it closer to my eye - I will have a different set of issues I am not considering?

Second, both the Warne and Millett say "Extra High" on Optics Planet but give no measurements on what that means? why would they just say "extra high" and call that useful info? On the Warne site it says the A204L is "ultra high" at .935"... but is that to CL or bottom of tube? The Millett AL00722 says 1.025" - so, does it seem in the end, to clear that BUIS, I would need these types of 'extra high' rings AND a riser like the little YHM mini risers I was looking at that add .50" - thats what UglyDwarf made it sound like - so then you are at about a 2.0 center line??? 1.025+.50 (for 1" tube) + .50 for YHM riser.

[Knight]

A couple of no-cost options: either get rid of the BUIS or move the BUIS in front of the scope. The BUIS in front of the optics might sound weird, but it is an accepted practice.

[glock_this]

check this out.. a little spacing (rubber erasers) of about .40" puts me about .25" above the rear BUIS.. so it seems, I need just shy of .40" or less additional height + my rings height to clear that rear BUIS - and the only way that seems it is going to happen is with a riser or, as I first thought, the YHM mini risers. they are .50, so then I am really clearing the BUIS, but heck, seems no real go between to get exactly the height I want to just barely clear the BUIS as there is no such mount/rings that gives me the exact 1.75" center line height I appear to need.