Someone pointed out that they didn't feel I understood the point behind being able to engage single targets at 500 meters with precision rifle fire. I actually understand the theoretical application of small teams of specialized riflemen extremely well. Hell, I even like the concept intellectually, because of the Revolutionary War-era/frontiersman mystique that surrounds the concept (Morgan's Riflemen, Francis Marion and his South Carolina irregulars, The Green Mountain Boys, etc). There is even a real place for it in UW, although, like a lot of "cool" ideas (suppressors, NODs, etc), their applications in UW/resistance operations tend to be much more limited than Joe Snuffy from the Block envisions.
I can ring steel silhouettes at 500+, with iron sights, all day long, under field conditions, in the wind and snow even. I've made one-shot stops, in combat, at 600+ (admittedly, running an ACOG), with an M4. Hell, HH6 can ring steel silhouettes at 400 and 500, with at least 75% hits.
The idea of hit-and-run sniper teams is fine. If you're a sniper, with the requisite fieldcraft, it might even work for some applications...route interdiction comes to mind. Harassing fire on fixed installations, and targeted assassination of specific regime personnel...you know, typical sniper missions. As a "normal" small-unit mission? I don't see it working in reality.
The concept that guys who front this idea are talking about is called a "far ambush." The responses from a conventional force light-infantry security forces element? Lay down a base of fire, maneuver, indirect-fire support, and close-air support.
So, yeah, there's some specific applications of sniper teams/squads in UW. Not as much as a lot of guys would like to think, but some.
Further, harassment by fire alone, even if you kill one or two out of nine or ten every time (HIGHLY unlikely, regardless of how bad-ass Gunny Hathcock you think you are), you're still not going to win an UW campaign like that, because at some point, in order to win, you're going to have to close with, engage the enemy with overwhelming violence of action, and shoot the motherfucker in the face.
A four-man team of guys who can hit single-shot first-round hits at 500M is going to hell for more effective, if they know how to apply that in the support-by-fire role, than a six-man precision rifle team, who only knows the one-shot method, because they're A) going to put a lot more effective rounds downrange, B) actually be capable of maneuvering against the enemy, and C) put enough EFFECTIVE suppressive fire downrange to keep the enemy's head down, so they can break contact.
One, two, or six rounds isn't going to phase me. I'm not going to stand on a fucking ridgeline, pulling a Patton, like a pop-up target on the qualification range, or some Cornwallis on an Appleseed range. If you get to see me, it's going to be as I kneel down next to one of my guys, to point out to him where to engage most effectively, then I'm going to be moving again, and trust me on this. I'm a decade older than I was in the 'Stan, have even more injuries, and worse arthritis than I did then, and I can STILL move faster, kitted up for war, in the field, than competitive athletes can (I prove it regularly). The precision rifle team isn't going to "pin me down" that way, and as soon as the first round comes in, my people are going to be maneuvering, FAST, to counter the threat, with adequate fire to keep you from getting away, while some of my guys move to get around you, out of sight (out of mind).
If you don't know, understand, and apply the fundamental individual and common tasks skills that centuries of armed conflict between humans have proven work and work well, you're not going to survive, let alone win. There's nothing new in the art and science of war, boys and girls. Quit trying to make it fancier than it is. A sublime master of the fundamentals is advanced skill in any physical discipline.