RMR on Lightweight AR15

[Eurodriver]

I'm looking at throwing an RMR on my LW AR15. Specifically, the RM06 (3.25MOA dot)

Has anyone done this? I know Mac runs one of his guns like this, but I'm curious what mounts are out there that are both quality and get you around that 1/3 lower co-witness mark. Is the Trijicon mount all that's out there?

[Failure2Stop]

Have you tried the rmr yet to verify that it suits you?
I really wanted to like it, but the fish eye effect of it bounces it out of acceptable primary aiming device candidacy for me.

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[jc000]

I run the RM08A with the triangle recticle. I use the ADM mount, works fine for me, but it is an absolute co-witness: I do not believe there is any lower 1/3 co-witness RMR mount available.

I would also echo F2S's comment. I got a very good price on mine, and the light weight and fiber optic/lack of batteries was a plus for me, but if I had to do it all over again, I would probably explore some other options. I have not used it enough to definitively comment but it's not incredibly "user-friendly" for me.

[Eurodriver]

I have only used it on a Glock. I did not notice any fisheye effect and it seemed to be a pretty good RDS. Of course this was at ranges less than 25 yards.

But it is only 2oz or so lighter than a T1 and about the same price. This might be one of those "If it ain't broke don't fix it" situations. I just liked how there was no shroud around the glass like on the aimpoints

[1911-A1]

Not an RMR, but I have a $400 Leupold Deltapoint on a picatinny rail riser on my LW BCM middy. It's held zero just fine, co-witnesses, weighs practically nothing, and has a much less obtrusive profile than even a T1. I'll see how it does in a few thousand rounds. So far, it's great.

[JasonM]

I have only used it on a Glock. I did not notice any fisheye effect and it seemed to be a pretty good RDS. Of course this was at ranges less than 25 yards.

But it is only 2oz or so lighter than a T1 and about the same price. This might be one of those "If it ain't broke don't fix it" situations. I just liked how there was no shroud around the glass like on the aimpoints

I find the distortion to be really high on them as well as the blue tint.…

And the "no shroud" aspect is a double-edged sword as there is also no cover/protection for the emitter.

[El Cid]

Haven't used an RMR to comment on the fisheye effect... but another option in the small/light category is the Insight MRDS. I have one on an SBR and it's been great so far (not a high round count). I really like that it auto-dims/brightens based on your surroundings. I use an ADM mount with the aluminum shield that came with the optic. The other nice feature is you can change the battery from the top, without removing the sight from the host weapon.

http://www.brownells.com/optics-moun...prod31905.aspx

I went with the 3.5MOA dot over the 7.5 as it's on a rifle.

[sandsunsurf]

I have an RMR RM07 on a 8" Noveske .300blk that's a pretty lightweight build. I like it, but the dot definitely isn't always as easy to acquire in non traditional firing positions as is hoped it would be. I never noticed the fish-eye effect until just pulling it out of the safe and looking at it. I've always liked how clear the RMR glass is compared to older reflex sights. Just today I was talking to a coworker about moving this RMR to a Glock with a milled slide, and he told me finding the dot quickly took some practice on his M&P core 9mm.

[Don Robison]

I'm using one on a 12.5" MRP and like it. The ADM mount is absolute co-witness, but I'm using Magpul MBUS front and rear so the height works fine for me. After using them on my pistols, Uzi and now a carbine I have found them to be durable, but not 100% problem free. Of the five I have, I have had to send one back for a warranty repair after roughly 5,000-6,000 rounds on my training pistol the dot went away. Trijicon replaced the electronics and it has been trouble free for the last 2,500 rounds.

[uffdaphil]

I mount the RMR on my home defense 10.5" primarily for the small profile/ no snag properties. No problems acquiring quickly or oddball visual effects. Prefer Aimpoints for outdoor use.