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Posted: 4/20/2006 4:06:48 PM EDT
| What does it look like and how does it differ from the A2? |
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Depending on lighting conditions or glare, the square edges tend to give a crisper sight picture and was included as part of the M16A1s 'upgrade' to A2. Once the square profile was adopted, the 5 adjustment positions had to be reduced to 4 to maintain a clean sight picture. One complete turn of the front post still resulted in a 5MOA change of elevation (thread pitch is the same), but the 4 possible positions of the A2 divided that into 1.25MOA adjustments instead of the A1s smaller 1MOA adjustments. |
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