Originally Posted by
Mike Barham at Galco
DJ is pretty well on the money. I like the Aimpoint for close-fast shooting, but beyond 200m, it gets a little dicy with the 4MOA dot. It completely covers a silhouette target at 300m. You can still make hits, it just requires more care, and they may not be as precise as you might like. The thing is like lightning under 100m, regardless of what various goofballs say about irons being faster than optics.
The ACOG is excellent for longer-range shooting, but handicaps you up close, just like any other magnifying optic. If I had a 20" HBAR and I wanted to shoot a lot at 150-400m, I'd be all over the ACOG. But on a 16" M4gery, I think the Aimpoint is all you need. The 5.56 out of a short barrel is pretty puny medicine over 200m, anyway. If you want to shoot that far, you now have a great excuse for buying a .308 AR, M1A, or FAL!