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Posted: 9/21/2002 7:41:09 PM EDT
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tell me if i am incorrect. arms40 buis has an a2 rear aperature. zero small aperature at 25m. this gives you a 200m zero with the large ap. and a 300m zero with the small one. (theroretical 500m with notch) what about not being able to go up a click like on the a2? (2 clicks for carry handle) how does that effect things? what if i wanted to use the santose zero? how would that effect the large aperature? damn, i am confused. [:\] |
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oops, found this by forrest, here www.ar15.com/forums/topic.html?b=3&f=12&t=134731&w=searchPop "Here are some thoughts on zeroing: 1) Don't zero at 100 yards. It is a really limited trajectory. If you really need a 100 yard zero set the dial to bottom out 3 clicks below 8/3 (see the Santose IBZ on how to do this at the above mentioned site). Then adjust the range dial so it is 2 clicks below 8/3 and zero at 50 yards. Now the number on your elevation wheel will be correct, and if you bottom it out (at 8/3 -3) you will have a 100 yard zero, go up 1 more click (to 8/3 -2) and you will have a great all-purpose zero. 2) Don't zero at 25 yards. Zeroing at 25 yards gives you a far zero around 400 meters. The round gets REALLY high around 175M (such that you could miss a man sized target whein aiming COM). If you must zero at 25 yards set the dial to '4' for rifles and 4 +2 clicks for carbines. Doing this will get the elevation wheel correct. 3) Zeroing at 25 Meters was orginally done with the M16A1 using the L (long range - 375M) aperture. Because with M193 the crossover points are 25M & 375M. Once zeroed we flipped over to the unmarked aperture for a 43M/250M battlesight zero. 4) With the new M16A2s the thought was you could zero at 25M with the elevation wheel set to 8/3 +1 click (and just set to 8/3 or 6/3 for the M4) and zero with M855. Sadly this has been proven to be incorrect and when using this method the rounds are hitting HIGH at 300M. If you want a very good zero that works fairly well with A1 & A2 sights or with either M193 or M855 then you should try the Santose Improved Battlesight Zero (IBZ) as mentioned at the above listed sight." |
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