Rookie deciding on 1/3 co witness or absolute. Help

**Offensive** · 07-08-20, 09:00

Have an 10.5” pistol build. Flip up back ups, trying to determine best set up between a 1/3 Co witness or Absolute. Opinions needed please and reasons for them.

**sbrown3** · 07-08-20, 09:54

Keep front sight up, rear sight down, use lower 1/3

**Clint** · 07-08-20, 11:03

Sight height is mostly about head position.

For standing/walking a higher center line is better.

For prone/bench, a lower center generally works best.

For the use case of a red dot, the 1/3 or a little higher is generally good.

**titsonritz** · 07-08-20, 12:13

Check out this thread if you already have not...
https://www.m4carbine.net/showthread...-of-Co-Witness

All my RDS sit on 1/3 co-witness mounts. I have them with no BUIS sights, fixed FSB with folded rear and with both front and rear fixed sight. I'll probably get 1.93" mount one of these days to check out too. As Clint mentions above, unless you primarily shoot prone/bench, higher is better.

**Offensive** · 07-08-20, 13:05

I had not read that. Very interesting read. Thanks for the point in that direction

**chef8489** · 07-08-20, 14:17

If I have a fsb I do a lower 1/3. If I have flip sights I use absolute.

**ggammell** · 07-08-20, 17:08

Originally Posted by sbrown3

Keep front sight up, rear sight down, use lower 1/3

Why??

**rockapede** · 07-10-20, 13:05

I can barely stand to shoot an absolute mount anymore; I feel very cramped in any position but prone. Heck, most of my mounts aren't even lower third anymore (only have one of those left); they're all 1.93" or 2.26" now. Going forward (FOR ME and my facial geometry/body type), RDS will go in nothing lower than Unity Fast mounts and LPVOs will go in nothing lower than 1.93". Precision guns still get 1.5" mounts but they're shot prone much more; even then, reports of tall mounts being totally unworkable prone are highly exaggerated, IMO.

I don't care about irons anymore unless policy requires me to.

**Devildawg2531** · 07-13-20, 15:54

I have an FSB and back up iron sights. I use an absolute co-witness with my AimPoint T1 and love it. The FSB doesn't obscure the dot and I can flip up the BUIS and use very easily with no adjustments. Absolute co-witness just seems natural to me compared to lower 1/3.