Indeed you are correct, I over simplified. Now more lesson on the M4 so some kiddies will have an idea. - A pristine M4 given that what is in the game has what lookes like 14.5 inch barrel, should have an effective engagement distance of 300 meters. - However, the effectiveness of the rounds in creating a kill shot diminishes as the distnace increases. At 600 meters your bullets will just be ice picks, will hit people but unless it hits bone, the guys can recover. Past that and grab your ass some Mosin Nagants. - However, depending on the ammo you have, say you find an SOST, that shortens the difference in effective range between the Mosin Nagant and the M4. The USMC is testing it in Afghanistan right now. - the 5.56 is however deadliest 300 meters and closer, with the M855/SS109 more effective for armored personel and the older M193 more effective for unarmored personnel. - If you want more accuracy for your M4, go prone hold your breath, and or use a bipod. Notice how many are not killed in firefights despite the volume of fire? *Why i went down to the details of the bullets, is because I noticed last night that the M4 is quite detailed in the game, with different types of mags, red dot sights, and furniture available. So it would just be time till that would be added (Oh please programers do add it) to make it more realistic.