From what I recall, all of the SAWs we went down range with had either an ACOG or a CQO on them. My experience with them is limited to basic qualification, ~500 rounds, which was a blast, but other than that, all I can say is that the shortened "paratrooper" variant is about useless past ~175 meters.
NRA Life Member
Me: "The .45 GAP was an answer to the question nobody asked."
Trooper pal: "Says the guy who thinks .38 Super and 10mm are viable pistol calibers and gets mad when Wal-Mart doesn't have them."