timed from when you shoot the 10m one, in a line, as if you'd enfiladed them, from ambush, is a 1.5 second deal, from standing. From bipod, you can double the ranges and still beat 2.0 seconds. 5 seconds is all effing DAY in a fight. What matters is what you can do before the enemy can take effective counter-measures. If your first shot has no blast, comes as a surprise,and especially if cover is more than 20 ft away, you are somewhat above them, etc, they are unlikely to be able to do a damned thing to save themselves, in less than 2 seconds. If they are green, have safeties engaged on AK's, have their longarms slung over their shoulders, are exhausted, sick, depressed, etc, you could easily have 3 seconds before they did anything but drop to prone. If you've set it up properly, doing so won't offer them much, if any cover from your fire. So you might get a bullet into as many as 8 of them, especially if you have a suppressor and a subsonic load, before they can do jack crap about it, if you are really good and have a properly controlable gun and load.