Posted: 9/7/2012 12:07:34 PM EDT
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I am trying to remember how many moa there is in a full 360 degree rotation of the front sight on a NM AR-15. After re-barreling my RRA upper I am up about 10 clicks on my 1/2 min sights @ 100 yds, and I would like to drop my front sight so that I am more like 10 clicks up at 200.
1.25 moa sticks in my mind, but I can't remember if that was a quarter turn on the front, or all the way around. TIA for any help. |
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Just ignore what I wrote before. I looked at an old TM for the M16 and thought a 4 sided tritium night sight post would be the same thread etc. I checked FM3-22 for newer model military issue weapons but apparently that doesn't agree exactly with what Panzer says so we'll just ignore that publication too.
Where do I get this 1/4moa front sight post for an AR of which he speaks? 
Table 7-7 in FM 3-22 indicates 1.2 moa per click. |
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Wow all that math and wizzardry and you didn't understand the question.
1.25 MOA per click of the front sight is the number thats stuck in your head, and as lenny stated, 5 MOA for a full turn. I would recomend 5 up from bottom for your 200, should be 2-3 up for 100 with 1/2 min sights. My 1/4s are set u at 10 from bottom at 200, 5 for 100. if your using the RRA "NM" front sight it is tapered and angled away from ONE side, and you have no choice but to move it one full rev. Swap it out to a standard .072 square sight and give yourself a little more leeway, and an easier focus point, especially back at 600 at the end of the day. Takes a little getting used to, but it is the way to go. Hope this helps. |
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Quoted:
Wow all that math and wizzardry and you didn't understand the question. 1.25 MOA per click of the front sight is the number thats stuck in your head, and as lenny stated, 5 MOA for a full turn. I would recomend 5 up from bottom for your 200, should be 2-3 up for 100 with 1/2 min sights. My 1/4s are set u at 10 from bottom at 200, 5 for 100. if your using the RRA "NM" front sight it is tapered and angled away from ONE side, and you have no choice but to move it one full rev. Swap it out to a standard .072 square sight and give yourself a little more leeway, and an easier focus point, especially back at 600 at the end of the day. Takes a little getting used to, but it is the way to go. Hope this helps. I remember years ago when I first got the rifle I was playing with the front sight, and the next match I shot I thought my eyes were going because the sight looked cock eyed. You guessed it, I had turned the sight a quarter turn not knowing that it was tapered.  I have tried different width sights, and I always return to the .052 for some reason, but you are correct about eye strain. At this point in life I use a pretty good size rear aperture to avoid the cob webs, and eye strain. I could file the front sight off until I wind up 3 clicks at 100, but my file job on my M1 came out just so so. Thanks for the help.
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