A2 upper vs. A1 upper > AR Discussions

Posted: 6/14/2004 10:20:26 AM EDT

Oly Arms are swapping out my cast upper & lower for forged models and I was wondering if I should pay the extra money for the A2 upper or not. Is there that much difference between the two if I'm only using the AR for plinking and not competion shooting?

Thanks.
c

Posted: 6/14/2004 10:28:07 AM EDT

[#1]

For just plinking, I prefer the A1 for it's clean looks and simplicity. I have replaced the rear aperture with an A2 style, for faster sighting.

Posted: 6/14/2004 10:30:04 AM EDT

[#2]

Do you think you'll be making elevation adjustments with the rear sight? Unless shooting matches, most people (myself included) set the elevation and then never touch it. If you're a match shooter, you'll need the elevation adjustment of the A2. If not, I'd vote to use the A1.

Posted: 6/14/2004 10:33:37 AM EDT

[#3]

Quoted:
I have replaced the rear aperture with an A2 style.

A1 with A2 aperture here as well.

Posted: 6/14/2004 10:45:07 AM EDT

[#4]

Thanks guys. I'm a newbie here so please excuse my questions, but what are the differences in the A1 and A2 apertures? Also do you mean I can have an A1 upper with an A2 apperture?
No elevation adjustments for me either.

Thanks.
c

Posted: 6/14/2004 10:48:28 AM EDT

[#5]

A2 has a small and ghost ring aperature.A1 has 2 aperatures of the same size and 1 is for longer range or something like that.Anything to add to that anyone?

Posted: 6/14/2004 10:49:45 AM EDT

[#6]

Quoted:
Oly Arms are swapping out my cast upper & lower for forged models and I was wondering if I should pay the extra money for the A2 upper or not. Is there that much difference between the two if I'm only using the AR for plinking and not competion shooting?

Thanks.
c

I have always like the A1 upper better. When we transitioned to the A2 in 1983, I found the dials on the A2 rear sights would lose their setting when slung on long road marches with lots of other gear rubbing up against the rifle. If it's only for the range, though, the A2 sights would work fine for you, more adjustments. The A1 sights are much simpler, I like simple.

Posted: 6/14/2004 11:30:44 AM EDT

[#7]

Swap out the A1 aperture for A2, AND make sure you have the A2 square front post. It has a sharper profile than the A1 round post.

Also, a nice upgrade, get a Rapidex Windage Knob. With this setup you have sights that for all practical purposes will do just as well for you as the A2 upper.

Posted: 6/14/2004 11:38:08 AM EDT

[#8]

Quoted:
Quoted:
I have replaced the rear aperture with an A2 style.

A1 with A2 aperture here as well.

Me three.

To swap apertures on an A1 upper, drift out the windage knob pin and carefully remove the knob. Be sure to catch any springs or detents that may fall. Unscrew the cross bolt and replace the aperture. Reverse to reassemble.

Posted: 6/14/2004 11:46:11 AM EDT

[#9]

Quoted:

I have always like the A1 upper better. When we transitioned to the A2 in 1983, I found the dials on the A2 rear sights would lose their setting when slung on long road marches with lots of other gear rubbing up against the rifle.

I had an instructor teach me a trick for that problem. After you zero your rifle, Turn your windage knob all the way to the Left and count the clicks.

If you ever have someone mess with your windage, just turn it all the way to the Left and then count off 52 clicks (for example) to the RIGHT. Your rifle should be back at your zero.

Posted: 6/14/2004 12:32:28 PM EDT

[#10]

Don't know how much this will help but here goes. When I was in the service, we had the A1 type sights which after zero I never touched again. I do that now with the A2.

That being said, I like the A2 better cause it's sexy!

Tj

Posted: 6/14/2004 12:39:33 PM EDT

[#11]

Quoted:
Quoted:

I have always like the A1 upper better. When we transitioned to the A2 in 1983, I found the dials on the A2 rear sights would lose their setting when slung on long road marches with lots of other gear rubbing up against the rifle.

I had an instructor teach me a trick for that problem. After you zero your rifle, Turn your windage knob all the way to the Left and count the clicks.

If you ever have someone mess with your windage, just turn it all the way to the Left and then count off 52 clicks (for example) to the RIGHT. Your rifle should be back at your zero.

Doesn't exactly sound combat effective walking around with your rear sight pulled to one side. I can see knowing the number and writing on the buttstock so you can rezero if you need to, but not leaving it to one side.

Posted: 6/14/2004 1:42:26 PM EDT

[#12]

Quoted:
Quoted:
Quoted:

I have always like the A1 upper better. When we transitioned to the A2 in 1983, I found the dials on the A2 rear sights would lose their setting when slung on long road marches with lots of other gear rubbing up against the rifle.

I had an instructor teach me a trick for that problem. After you zero your rifle, Turn your windage knob all the way to the Left and count the clicks.

If you ever have someone mess with your windage, just turn it all the way to the Left and then count off 52 clicks (for example) to the RIGHT. Your rifle should be back at your zero.

Doesn't exactly sound combat effective walking around with your rear sight pulled to one side. I can see knowing the number and writing on the buttstock so you can rezero if you need to, but not leaving it to one side.

I think thats what he meant. not a bad idea.

Posted: 6/14/2004 2:03:25 PM EDT

[#13]

Certainly makes more sense that way!

Posted: 6/14/2004 6:31:00 PM EDT

[#14]

coyote, is that the armms mount on that rifle, and if so, how do you like it?

Posted: 6/14/2004 8:12:02 PM EDT

[#15]

Quoted:
coyote, is that the armms mount on that rifle, and if so, how do you like it?

It's a Precision Reflex actually and it works great.

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[ARCHIVED THREAD] - A2 upper vs. A1 upper

[ARCHIVED THREAD] - A2 upper vs. A1 upper