RDS: Co-Witness or Lower 1/3 Co-Witness... your thoughts?

[DHart]

As I consider purchase of a riser for a Primary Arms Advanced Micro Dot RDS, the question arises... co-witness or lower 1/3 co-witness?

Thus, I am here, once again, to consult the (collective) Oracle. So, what are your thoughts?

[Tomac]

Personal preference based upon cheekweld and BUIS through the optic. I like 1/3 but YMMV.
Tomac

[Uprange41]

It's preference, but I do think rifle requirements should play some role in consideration.

I use fixed irons and a lower-1/3rd co-witness, QD mount on my HD rifle. If the dot dies for whatever reason, I can either use my irons immediately, or if I've got time, take the dot off. Also, I tend to treat my rifles as irons-first, and a red dot needs to be set up so that I can go back to irons immediately. I do the same with AK's... lower-1/3rd co-witness, and a QD mount.

Absolute with fixed irons can be cluttered, but if you've got flip-ups, it is more about cheek weld. There's a minimal, but noticeable, difference in cheek weld between absolute and lower-1/3rd. If you're running with a fixed mount, make sure you re-zero your irons through the glass. If you're going QD, zero without the glass in between. The glass can distort your sight picture.

[Kain]

Personal preference based upon cheekweld and BUIS through the optic. I like 1/3 but YMMV.
Tomac

I kind of have to agree here. It is preference. Have used both, I have my preferences to 1/3, but I know others who prefer absolute. Try both if you can and see what you like the most.

[T2C]

I prefer lower 1/3. The iron sights obstruct less of the view through the optic.

[malstew123]

I prefer is a lower 1/3 mount with fixed front and rear irons. I learned to shoot with irons so I instinctively want to get the nose to charging handle cheek weld every time, now all I do is bring my head up just slightly for the red dot or down for just the irons.

[Leuthas]

Experience has slowly taught me that a greater clear field of view is better in practically any situation. Lower 1/3.

[wigbones]

Just like everyone else so far, I prefer lower 1/3. Less clutter when looking through the optic is a good thing.

[samuse]

Lower 1/3. More forgiving of head position, less fatiguing when shooting a lot.

[DHart]

With a lower 1/3, the red dot sits higher, correct? If so, would like that, as I find the iron BU sights seem low on the rifle to me and I have to scrunch my head lower on the butt stock than I would prefer with the irons. If the red dot sits higher, I wouldn't have to scrunch my head down so low on the stock.