I recently went to sight in my new M4 at the Ascension Parish Sheriff's range and unfortunately it was right before hunting season. Anyways, they keep a hot line in the time before hunting season so I had to sight in at 100 yards because I couldnt move my target. I was able to get maybe a 6" group at 100 yards but I want to sight the rifle in properly. I believe the M4 is supposed to be sighted in at 25 meters (82 feet). I have a few of the targets the military uses to sight in M4's and they are supposed to be @ 25M. My question is how can I sight in my rifle at Precision Indoor range if the range isn't long enough? I have been on their pistol range and I'm not sure if their rifle range is long enough. I would assume that they have some special targets with calculations on them about where the bullet should fall @ 300M ( So I can properly use my 6/3 knob). I'm trying to avoid wasting time and money going to a range where I can't get my sights aligned so my shots are "on the money" Can anyone tell me if they have any experience sighting in AR's/M4/s at Precision?