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Posted: 12/29/2003 5:22:12 PM EDT
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I can't find this info ANYWHERE! How many MOAs are covered by the standard (0.070") A2 front sight on a 20" barrel? How does one go about adjusting the Trijicon CP25F front sight post? This sight has a thicker base than the standard sight, so the 4-prong front sight adjustment tool just can't quite push the retaining pin far enough out of the way to allow the base of the sight to rotate. Does anyone make a front sight adjustment tool with a deeper reach? |
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I measured my Bushmaster upper and from the rear sight to the front post it measured exactly 20". If your eye ball was a bit farther back the angle would change a bit. So doing a bit of trig A=20" B=20.1" (yeah I know) C=0.70 Angle equals 0.20053440944962447 or 3.565056167993324 MILS or 12.032064566977468 MOA Allowing 1.5 inches of eye relief or A=21.5" I get the angle of 0.18654373927515996 or 3.3163331426695106 MILS or 11.192624356509597 MOA So figure that the front post covers one foot at 100 yards give or take a inch depending on where your eye is sitting. [url]http://www.1728.com/angles.htm[/url] Science!!! |
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Quoted: How does one go about adjusting the Trijicon CP25F front sight post? This sight has a thicker base than the standard sight, so the 4-prong front sight adjustment tool just can't quite push the retaining pin far enough out of the way to allow the base of the sight to rotate. Does anyone make a front sight adjustment tool with a deeper reach? I know exactly what you're talking about. The problem is that the tool you're using is only deep enough to accept the sight post in the center (if you look inside the sight tool, you'll see that it's concave, not flat). The fix is to get a drill bit that fits the hole in the tool, and drill the tool all the way through. I did that with a couple of sight tools, and now it's VERY easy to adjust the Trijicon sights. There is also a long, narrow sight tool that is already deep enough, but I already had several of the short, fat ones, and they're easier to use overall, so modifying them was easier for me, and turns out to be a better tool in the end. -Troy |
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