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Rifle Scopes Help with primary optic

I'm looking to do another AR build with a red dot set up. Here is a little of where I've been. The AR I have is a S&W M+P T that first had a eotech 553 w/ 4X magnifier. I was a hugh fan of this setup but was worried about battery life and all the reports of field failures (even though I never experienced any). I ended up selling that setup for an acog TA31-F. I also like this setup, but the eye relief was tuff for me to get use to. I've looked into the doc mounted on top and a 45 degree mount but wasn't crazy about having anything hanging off to the side. SOOO I sold that and purchased a TA11 after alot of research and many forum IM's. I'm very happy with this setup but I kinda miss my red dot some? With that I'm thinking of building a simple bushmaster with a flat top for a red dot. Either that or another M+P T? I would like to put faith back into eotech but I'm not sure if I'm there yet? I like the idea of the XPS but would like to see some real field results first. Keep in mind my weapons are target horses, but I practice with them and rely on they for any SHTF situation. Saying all that to ask this... The other red dot I was looking into was just putting a simple trijicon RMR on a high mount on the flat top. I would get the red 4MOA dot. Whats the battery life on these units? I'm sure it would be durable enough since they claim its built as tuff as the acog. I would think this would make a nice light weight QCB rifle. Has anyone else done this? I know it depends on your eyes and the shooter, but was a realistic range for thus red dot? If you wanted to could you mount somekind of magnifier to it?? Or does anyone feel the eotech can be trusted again??? I know it would be cheaper, but I know trijicon's stuff is built very well. Let me know what you guys think? Thanks.
 
Re: Help with primary optic

I have that exact setup, TA11H with RMR mounted on top. I like it a lot but am considering putting a side oblique mount for RMR because of the height of RMR...Not a huge factor for me, just experimenting

Your range with red-dot RMR would be the same as Eotech without mag or iron sights, what your vision would allow. Except at beyond 100 yards, the RMR red-dot can obscure your target.

I am unaware of a magnifier for RMR, and can’t comment on that.

For a separate rifle build, if you don’t want a lot of mag, how about a ACOG 1.5x24, it has 3.6” of eye relief and no need for batteries.
 
Re: Help with primary optic

I'd look into the ACOG 33R, 3X and much more generous eye relief. Or an Aimpoint ML-3 with a 2 MOA dot (4MOA dot obscures to much of your target past 100yards IMO) and a 4X magnifier. Aimpoint battery life is huge and they are as tough and reliable as an ACOG.