Fixed FSB / LPVO Mount height question

[warbow150]

Howdy, all
Currently have a micro t2 on my Colt 6920. I’ve got a 1-6 Trijicon Credo on the way, along with a Geissele Superprecision M4 Mount. That mount supposedly puts center of optic 1.54 above the rail. I like the fixed fsb and run a rear buis under the optic, so I’d rather not shave off the fsb. My question is as follows:

If running a 1-6 on 1x-2x, will the 1.54 height be adequate to use the reticle with the fixed fsb, or would a 1.93 / 2.04 height mount be a better choice?
Thanks!

[Leonardo]

The 1.54 will give you, or a very close to, co-witness reticle with the FSB pin.

[MegademiC]

What do you mean “use the reticle?”
If you mean the dot, just ignore the fsp like its a red dot

If you mean the bdc or mil/moa marks, i would think is a non issue since the fsp disappears at 3-4x with a 1.5” hight.

[ggammell]

BUIS under th e scope with a G$ mount are kind of pointless since it’s not a QD Mount.

[pyrotechnic]

BUIS under th e scope with a G$ mount are kind of pointless since it’s not a QD Mount.

Unless you clumsily trip, fall, and smash your optic perfectly on a rock. You can then use a Gerber or something else in camp to remove the optic and still be able hunt or LARP or whatever you were doing without having to go home and bitch about not having BUIS on M4carbine.

Sent from my SM-G950U1 using Tapatalk

[MistWolf]

What do you mean “use the reticle?”
If you mean the dot, just ignore the fsp like its a red dot

If you mean the bdc or mil/moa marks, i would think is a non issue since the fsp disappears at 3-4x with a 1.5” hight.

The FSB "disappears" but still blocks the lower half of the reticle, rendering it useless.

[Leonardo]

As stated, if a variable power optic is used, and is set to 1-2 power, the FSB will be blurred.
At 3 power and above, the FSB will disappear

[turnburglar]

I don't think you can use a BUIS through an LPVO, even if you turn it down to 1x. Also if you don't have a QD mount, a buis is kinda silly cause its highly inaccessible.

Your better off loosing the FSB.

[MegademiC]

The FSB "disappears" but still blocks the lower half of the reticle, rendering it useless.

Mine is visually not blocking anything, but havent tried to use it like that.
Do you mean its going to bend the light and alter accuracy?

[warbow150]

Hi, all
I know co-witnessing isn’t a thing with lpvo, I’m not concerned with that. I’m just wondering how much of the reticle will be blocked by the fsb at 1-2 magnification. If it’s just part of the bcd or lower part of the duplex that’s fine, it won’t bug me. I’ve run the t2 for a long while and am used to it. If, however, the fixed fsb rises all the way through the center of the reticle and gets in the way of the aiming point, that’ll be a concern.