I will be picking up a RS mount at some point this week (waiting on some kind of BF incentive). It comes down to threeoptions:

1.) RS mount with PA micro - if the micro craps out, use irons
2.) RS mount with my aimpoint pro which I'd pull off my 12" AR SBR.
3.) RS mount with TRS-25 (already have) but this will not provide any co-witness IIRC.

this is really annoying me on which option to go with.

I have a full sized aimpoint  in an MI mount, it just makes the gun a tad heavier, it doesn't make the balance weird or anything.

Pretty easy to find the center of balance on a rifle.  Balance the rifle (sans magazine) on your forefinger or a wooden dowel or the like.



Once you find the location of the center of balance for your rifle, you can get some kind of indication of whether the location of the optic will shift weight to the front or back of the rifle.  It may improve the balance, make it worse, or do nothing at all.



We do this a work with heavy machinery.  We place a large metal rod (Solid steel, 4" in diameter) on the floor and set the machinery on the rod with an overhead crane.  We keep adjusting the rod under the machinery until it balances (or nearly balances).  Customers need to know the center of gravity on our machinery when they go to lift them with cranes during the installation.  Our engineering department needs to know this so they don't design machinery that is grossly unbalanced and difficult to pick up during the manufacturing process.

Heavier, yes.

Unbalanced, no.  Not that I've ever felt, anyways.

ended up with the AKMD option to use a TRS-25 I've got.

I like the Pro in the RS. I had a Ta-33 on there before and the balance was nice, the weight was back near the stock. To me it balanced better honestly. I'm going Pro on my current AK project.

Does this reduce the space between the big nob on the pros clamp and the charging handle resulting in pinching your fingers while operating the charging handle ?...

My T1 Micro in a RS really doesnt change anything about the guns balance. Even the weight is barely noticeable, but then again the KV-13 its on is a heavy sonofabitch

I have an aimpoint Comp ML2 in an older Gen 1 RS Regulate Mount.  It is a tad bit heaver, but the balance is not thrown off because the optic is over the magazine well.  I like my setup.