I made a class just for the glitchers. They no longer bother me as bad. I use a kit with FAL-RDS/SCAR, Scavenger, Coldblooded, Sit-Rep, and a Stinger. My two friends I play with a lot also have one. Lets just say AC-130's get taken down very quickly.
Any tips for getting extended mag for the SCAR? I can't seem to get any kills through the wall/other.
On Quarry, at A side, there is this double window where a lot of people camp and run back and forth to protect Bravo. If they keep going there, I just camp right underneath it and shoot at the bottom, steel part. Works well.