I tried using the MSMC. I can be sighted in and firing but they can still come out of a full sprint, raise their gun, sight in and then mind**** me with their psychic powers before my bullets connect. Was it a pre-order bonus only with the CP edition or something? :(
Would you kindly read this signature?... PSN: SteveBob7 YouTube: SteveBob104
You need diamond camo on all guns, be at master prestige, and have all challenges for things like emblem parts and backgrounds completed. After doing this you need to do the fresh start. Doing so will unlock the psychic perk as well as the nuke and other unknown scorestreak (see David Vonderhaar's twitter).