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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.
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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 |
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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
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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.
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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.
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