My AR15 has A3 sights so one click (elevation) is 1/2MOA (which I think different from other AR15s). I finally think I get the MOA stuff. But what I'm still baffled on (and I've searched and read a lot) is how to actually use the elevations at different distances. (I haven't done anything beyond 50 yds yet- I'm still trying to understand all this though!
1) First- can the normal aperture rear sight(smaller hole) be used interchangably with the short aperture (big hole) at close ranges? Or does it effect the POI?
I assume I should Zero the gun at the 'z' mark at 25yds (per directions)? So that the POI is just level with the top of the front sight? Why at 'z'?
2) My elevation knob has a 6/3 mark, then 2 notches/click 'up' has a 'z', then 2 clicks up form there it has a '4', then 8 clicks up from there is has a '5', then 11 clicks from there is at back at the 6/3 mark again. I know the numbers are "hundreds" of yards but if each click is 1/2 MOA does this mean for example that the 223 drops 8 MOA between 4 and 5 hundred yards? With my calculation that would be 16 inches (8 clicks-1/2MOA each, with 1 MOA=4" @ 400yds)??? Doesn't seem right to me.
Maybe I'm making this much more complicated that I need to but I feel a little slow with all this sighting stuff!
1) First- can the normal aperture rear sight(smaller hole) be used interchangably with the short aperture (big hole) at close ranges? Or does it effect the POI?
I assume I should Zero the gun at the 'z' mark at 25yds (per directions)? So that the POI is just level with the top of the front sight? Why at 'z'?
2) My elevation knob has a 6/3 mark, then 2 notches/click 'up' has a 'z', then 2 clicks up form there it has a '4', then 8 clicks up from there is has a '5', then 11 clicks from there is at back at the 6/3 mark again. I know the numbers are "hundreds" of yards but if each click is 1/2 MOA does this mean for example that the 223 drops 8 MOA between 4 and 5 hundred yards? With my calculation that would be 16 inches (8 clicks-1/2MOA each, with 1 MOA=4" @ 400yds)??? Doesn't seem right to me.
Maybe I'm making this much more complicated that I need to but I feel a little slow with all this sighting stuff!