Hi .  

I have some Geissele sights on a Geissele URGI upper.
How much adjustment when zeroing is too much and time to look into something being wrong ?  

I attached a Google link with some pictures  I hope that's ok /works

The target is 25 yards



https://photos.app.goo.gl/dfvbsAMsEguyPB2D6

Could be caused by the front of the upper not bring square (seen many issues with this).
Can be corrected by lapping the receiver with a mandrel made for doing this.

Wheeler lapping tool



Like Wheeler's better due to flex shaft that keeps you from accidentally putting side pressure on tool while lapping.
Just do it enough to get near 100% contact. You will see where the anodizing is cut off, that is the higher area. Any black left is the low area.

That looks acceptable to me and I would not let it bother me.

+1

A bit far off for my taste, but as long as there’s some left to adjust for windage on the range later it should be all good.

If OP ends up needing some extra, he could file down the one side of the aperture.

OP, is your front post in straight? Is it offset by any chance? Rail bent? Can you flip the front around? Normally flip sights get installed so they fold towards the stock, did you happen to put it on backwards?

I’m hoping it just got put on backwards and it can be flipped to get a more centered zero.

It looks like you could come a couple clicks left on your zero, that will center your rear sight slightly better.

You have nothing to worry about IMO, I have seen a lot worse than that. Get to an actual 200 yard or 200 meter range and establish your final zero. 25 to 50 yards needs to be confirmed at distance.

I had a set up with 2 grub screws run through the bottom of an FSB

1 degree of rotation makes a huge difference in zeroing the set up

getting a rail flat and and a removable front sight square takes some effort

heres a cool "trick"

get a red dot sight zeroed

then tweak the iron sights to place the dot right over the tip of the front post



Bill's rails are tweaked by spacers in front of the barrel nut

you might be able to tweak a degree of rotation by loosening the rail mounting bolts and twisting the rail while tightening the bolts

or try loosening the front sight and pushing it left as you tighten the mount

you are not that far off center and in spec for 90 percent of builds

it is interesting your front sight is canted clockwise to the right (from the rear view)

more common is the rear sight being buried far left
due to the barrel nut being over torqued clockwise from the front view and the barrel pin being forced away from the ejection port side

that looks like a rail squaring grub screw

https://geissele.com/amfile/file/download/file/c7cdcb4ff9e032b4a232bb406374e881/product/1332/