Holographic sight question (EoTech)

[AggieDave 6]

For the shooters out there. If I have internally zeroed a sight, like my EoTech 516, I can remove it from the rail and it will still be fine as long as I return it to the same position on the rail, right? In other words, due to the machining, I wouldn't have to worry about the zero being off to the point of needing to re-zero?

I'm not taking off the BUIS and can do a quick verify since they all co-witness, but I wanted some opinions from the shooters as well.

--"When I die, may I be surrounded by scattered chrome and burning gasoline."

[TomAiello 26]

Yes.

i've taken an Eotech off the rail and put it back on--it didn't require re-zeroing.

-- Tom Aiello

Tom@SnakeRiverBASE.com
SnakeRiverBASE.com

[AggieDave 6]

Cool. I just want it well away from the gun scrubber I was going to spray everywhere after spending the afternoon breaking in my new AR.

With the old Reflex that I had, I would simply just wrap a rag around it and clean around it carefully, but this piece isn't issued and cost me a lot more money.

--"When I die, may I be surrounded by scattered chrome and burning gasoline."

[JohnRich 4]

Quote

For the shooters out there. If I have internally zeroed a sight, like my EoTech 516, I can remove it from the rail and it will still be fine as long as I return it to the same position on the rail, right?

I wouldn't count on it. Odd things happen with removing sights and reinstalling them. A few thousandths of an inch difference on the sights, unnoticeable to the naked eye, can make a difference of many inches downrange. Even the tension of the screws, or any torsion twist between the mounts, can change the point of impact. I've seen a lot of guys have problems with such things, with conventional scopes and ring mounts. Many deer hunters have missed their quarry because they removed their scope for transport, and then reinstalled it in the field. I don't know if those factors also apply to something like an EoTech, but I can imagine that they could.

Give it a try with removing the sight, but then take it back out to the range and actually see if the zero is still the same. Experiment and find out if this is going to be a problem with this particular sight and rifle. Don't just assume that it will be unchanged - it might not be.

[martlet 0]

In theory, yes. In practice, sometimes. It all depends on the level of accuracy you desire, the range, and your ability to tighten it to the same level.

I, for one, will sight my weapon every time I change an optic. It often requires no adjustment, but there are times when the adjustments are pretty severe.

[AggieDave 6]

I'm going to go rezero tomorrow, but as of right now, the sight still co-witnesses correctly with my BUIS. I'm betting that it will be just fine, but I will double check.

This is zeroed at 50yrds. I have my AR setup for CQB, since that is why I bought it.

--"When I die, may I be surrounded by scattered chrome and burning gasoline."