Quoted: But the 2 holes on the A1 are both the same size!! See why I am confused??
Sgtar15
|
The AR started out with holes the same size. It's just one leg is longer than the other (the one marked "L") which raises the rear hole higher for longer range.
With the A2, you don't need different range legs because you have the range adjustment drum.
They simply made a bigger hole in the shorter leg on the A2 so you could shoot at shorter range, moving, low-light targets easier (which is what most of the targets in combat are).
The A1 type sights, without any other range adjustment than the flip, have the same size hole so that you get the same accuracy at all ranges. On the A2, you get the same accuracy at all ranges because you flip to the small hole and use the range drum. It also gives you the added benifit of the larger hole at shorter range/low-light. The larger hole isn't as accurate, but it's a "hole"
lot faster.
Ross