Problems adjusting ACOG

Bemused

Just got an ACOG second hand so no manual. I fitted it tonight and can adjust it such that the scope is centred, albiet having to turn the windage dial almost completely to the left. On the other hand the vertical setting is too high - even adjusting it to the lowest setting I am still significantly above the point of impact. Any ideas?

Leftyflip

What range are you adjusting it at?

Bemused

about 50' - I was wondering if this was the problem - needs to be longer do you think? That said, the reticle doesn't seem to move much as I turn the dial.

Thanks for the input.

andy_g

what make/brand is it i have a gnp and have been told they sometimes dont adjust of the windage dials.

Bemused

Hi Andy,

I'm not sure of the make - it's the one in this thread

http://www.boards.ie/vbulletin/showthread.php?t=2055837984

I was able to adjust the windage although I had to adjust all the way to the left in order to centre it - just thought - could it be that the pressure from this adjustment is locking the vertical axis or at least restricting movement? I have the vertical adjustment all the way "down" and it is still significantly above the point of impact - I can just see the bb's hitting in the lower 1/5th of the scope. If there is a problem with the adjustment screws are there any optic experts around who might be able to take a look at it?

Thanks.

evilrobotshane

I'm not familiar with ACOGs, but I am familiar with the diagnostic process and although it's idiotically simple, I'd say the first thing to check is that it's sitting properly on its rail-mount. If it's skewed a bit that'd explain the problem you're having. Not meaning to be patronising, just we all often skip straight into the more technical stuff without considering the basics.

Bemused

lol, thanks Shane, and in particular for being gentle in asking me the question equivalent to "is it plugged in"? I think the mounting was fine when I tried to zero it in but I will confirm next time I try.

desertstorm

I had a problem with my acog where I thought the black caps on the scope were for adjusting, but they actually covered the dials for adjusting
Don't suppose that's the problem?

Bemused

Desertstorm,

Thanks for that mate but no, black caps are off an I'm playing around with screwdriver.

Tactical

Bemused wrote: »

about 50' - I was wondering if this was the problem - needs to be longer do you think? That said, the reticle doesn't seem to move much as I turn the dial.

Thanks for the input.

Just a suggestion (assuming its not your mounts putting a tilt on the scope), but have you tried zeroing at a much closer range then working outwards in steps?

Drachnien

I've only experience with rifle scopes but the same things should apply

Having one of the dials adjusted all the way to the max WILL restrict the adjustment of the other. If you have adjusted it all the way to the max and it is still off center or too high best bets to 'shim' the mounts. basicly put a little piece of plastic under the back (if it's too high) etc.

The rails on most weapons are not perfectly alligned with the barrel so this does happen occasionally.

In relation to the adjustments not doing anything theres usually a marking on the adjustment dial telling you what each click will do and it's usually a tiny adjustment per click. (somthing like 1/4" 50' would mean that each click only moves the target a quarter of an inch when shooting at 50 yards)

Hope it helps

Bemused

Before I explain how my scope is now working perfectly a few caveats are in order.

• I got the scope and mount at the same time and only had limited time to put them together
• It was late and I was tired after a long working week
• I was excited to get going
• er
• um
• that's it

Turns out Shane's suggestion of "check if it's plugged in stoopid" was spot on.

The mount has two bars that run underneath the scope and must match up with the grooves on the rail before tightening. I wanted the scope as far towards the back as possible since it has such short eye relief and so attached it right at the back. Seemed to fit fine but was aiming high.

Ok so this morning was the first chance I have had a few minutes to look at the scope again and when I went to mount it to the rail, conscious of the advice above, I checked that the bars and the spaces were aligned. Well lo and behold, when placed right at the back the front bar has no space to slot into and thus is elevated. Moving the scope one notch forward and problem solved. I haven't the time to zero it in but a quick adjustment leaves me with room to play with on each axis so it should be fine. It's so easy to sight down the scope with both eyes open, with the magnified "eye" focusing on the target when you stop moving.

Much obliged for the advice.

evilrobotshane

I feel so damned clever right now.

KNEEL BEFORE ZOD

zero86r

Only noticed this now! Is it zero'd in for you okay now?

Bemused

Hi Zero,

Just don't have the time yet to make sure but I think it will be ok,.......

ALL THANKS TO ZOD!!!

zero86r

Good, HAIL ZOD!!