[ARCHIVED THREAD] - ARMS #40 vs. #40A

Posted: 7/5/2003 10:31:48 AM EDT

What's the difference?
What are the pros and cons of each?

Thanks

Posted: 7/5/2003 11:21:17 AM EDT

[#1]

The ARMS #40 has a cut "horizon line", for the distance aperature, and the #40A has a regular full size A2 aperature. Personally, I don't like either one, and I installed a customized A1 aperature in mine. This, apparently, allowed the the stock Bushmaster front sight post on my M4 barrel to work with the #40, as I was able to sight it in without using the taller sight post.

Posted: 7/5/2003 11:23:24 AM EDT

[#2]

The 40's small aperture is cut on top to allow the lowest possible profile when the sight is stowed. They also added a sighting line on top and a slight notch to make the top part into a 600m sight. But some folks have trouble using the standard aperture, and don't like it.

The 40A uses a standard A2 aperture. It requires a bit more clearance when stowed.

Note that the aperture is replacable with any standard AR aperture, just like a regular A2 sight.

-Troy

Posted: 7/5/2003 1:45:03 PM EDT

[#3]

Also....If sometime down the bend you want to get an ACOG you will need the #40 not the #40a which will not clear the ACOG...........UNDERDOG

Posted: 7/5/2003 4:04:01 PM EDT

[#4]

Thanks a lot. This is good to know stuff and I'm going to pass it along to a buddy of mine who just bought a new Colt A3 16" upper.

Posted: 7/5/2003 10:15:39 PM EDT

[#5]

I've got a #40A. I love it. I specifically requested the #40A because I'm used to the full small A2 apeture. I don't really like the cut apeture of the #40.

[ARCHIVED THREAD] - ARMS #40 vs. #40A

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[ARCHIVED THREAD] - ARMS #40 vs. #40A

[ARCHIVED THREAD] - ARMS #40 vs. #40A