yeah, my mate was at one end of crossfire and me at the other he looked like a dot because it was dusty. And i hit him first time noscoping, i call that luck. bu i believe there are techniques to it. if you TAP L1 then shoot straight after that shoots + kills 6 times out of 10. theres a few more too.
1 time i was being relly cocky and it was on bloc i needed 1 more kill to win (ffa)
i jumped in the air and shot my sniper 1nce then again and it got some1 who was at the other building other side of the map
(without acog)