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Posted: 3/11/2013 8:31:19 AM EDT
| This Wednesday I should finally have my first AR-15, a Sig 516 Patrol. It comes with aluminum flip-up Buis sights and I plan on putting an Aimpoint Comp M4S with a LaRue mount on it. Any suggestions about what I should zero it in at? 50 or 100 yards or something else? Thanks for any help! |
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Look at option #6 here: http://www.ar15.com/forums/t_3_118/492084_AR15_Discussions__FAQ___Read_First_.html There are various methods, the two most common IMHO are the Combat/Army 25/300m zero and the RIBZ Molon posted (link is in the above link I posted). I used the 25/300m zero for several years, and only recently switched to the 50/200 yard RIBZ method. I find both to be sufficient for shooting minute of man. eta: hot link eta2: USMC does not use the 25/300m zero anymore, my bad. |
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I do the 25m initial zero then check at 300 if possible. However, finding that 300m range at times is a bit of a challenge...
That said, I once saw a self-proclaimed "firearms expert" attempt zero his AR15 at 5m at an indoor range. Yep, 5m. When asked why he told me, "because if I shoot an intruder in my home, its gonna be up close..." Not sure how that story is relevant, but I did want to share as it made me go 
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| It's one of those things that comes down to personal preference. Yards is what I know and feel comfortable with. So I use the 36yd for a 300. I use this method for my iron sights and Eotechs. Just remember to make your elevation changes with the front sight post when zeroing. |
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Look at option #6 here: http://www.ar15.com/forums/t_3_118/492084_AR15_Discussions__FAQ___Read_First_.html There are various methods, the two most common IMHO are the USMC 25/300m zero and the RIBZ Molon posted (link is in the above link I posted). I used the 25/300m zero for several years, and only recently switched to the 50/200 yard RIBZ method. I find both to be sufficient for shooting minute of man. eta: hot link Marine Corps BZO is done at 36yds. Army zeroes at 25m. |
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50m for me. there's a nice video on youtube of Haley explaining how different zero affect accuracy at different ranges, but I cant find it right now http://youtu.be/YUwve2VMFBU |
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Quoted: Quoted: Look at option #6 here: http://www.ar15.com/forums/t_3_118/492084_AR15_Discussions__FAQ___Read_First_.html There are various methods, the two most common IMHO are the USMC 25/300m zero and the RIBZ Molon posted (link is in the above link I posted). I used the 25/300m zero for several years, and only recently switched to the 50/200 yard RIBZ method. I find both to be sufficient for shooting minute of man. eta: hot link Marine Corps BZO is done at 36yds. Army zeroes at 25m. Odd, the two marines who originally taught me to shoot the AR had me zero at 25M. ETA: not saying you are wrong, as you are right. I just found that odd. Original posted being edited to reflect this. ETA2: I see now that the USMC used the 25/300m zero in the past, but switched to the 36yard/300m zero at some point in the last 10-15 years or so. |
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I use an improved battlesight zero. Sighting my rifle at 50 yards, it is dead on at 200 yards. Works for me. http://www.ar15.com/content/page.html?id=599 +1. I zero irons and my EoTech at 50. It will shoot minute-of-man out to 200. I zero magnified optics at 100. |
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Quoted:
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Look at option #6 here: http://www.ar15.com/forums/t_3_118/492084_AR15_Discussions__FAQ___Read_First_.html There are various methods, the two most common IMHO are the USMC 25/300m zero and the RIBZ Molon posted (link is in the above link I posted). I used the 25/300m zero for several years, and only recently switched to the 50/200 yard RIBZ method. I find both to be sufficient for shooting minute of man. eta: hot link Marine Corps BZO is done at 36yds. Army zeroes at 25m. Odd, the two marines who originally taught me to shoot the AR had me zero at 25M. ETA: not saying you are wrong, as you are right. I just found that odd. Original posted being edited to reflect this. ETA2: I see now that the USMC used the 25/300m zero in the past, but switched to the 36yard/300m zero at some point in the last 10-15 years or so. The M-4 zeroes differently than the M-16 because both muzzle velocity and sight radii differ. Both BZO are for 300m, but differing close zeroes,are required for different rifles. For those zeroing an optic, where one needs to be close in to be money at 300m depends upon muzzle velocity and sight height over bore. I like a 200 yard zero personally because my threat assessment includes hitting a small exposed target of opportunity inside 250 yards rather than a man size target at 350. |
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It's simple. The iron sights are designed and marked for the 300 meter zero which you do at 25/30ish depending on your barrel length. If you want the marks on them to mean what they say, it is your only option.
If you get a scope, especially one with bullet drop compensator, they may have different zero for it. For instance, my ACOG specifically says zero with it at 100 to get the BDC markings to work. So for me, I set my irons to the traditional battle sight zero (300), and then the scope at 100 meters... |
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