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
Big Sister: "Everyone in America is fine with the .30-30, except Mack. He has to shoot that .35 because that extra point zero fives inches will matter on Bigfoot."