I like the no perk/attachment challenges though. Makes you get a feel for the gun again. I do them both at the same time and hate every step of the journey. I usually rock out an Assault Shield as my Primary though, so it can deflect bullets shot at my back.
Shield (weapon here)
Tactician Wildcard Tactical Insertion (gets the challenges done quicker) 2 Tactical Grenades of your choice.
Doing awesome in a game, only for my partially broken ethernet cable to pull that time to mess up and cause me to lag out of the game. --- GT: Boomer and Tank Pretty darn confident..... I don't want to have to wait till the Microendony XBOXS 4ii comes out another 15 years later....