I have already completed m4a1 marksman VIII ( i'm at level 70) it said there i need to get 1000 kills with my m4a1 assault rifle, however i've already had 1000 kills with it and yet i didn't receive the emblem for it. Last time i've already finished the challenge for getting 500 kills wih my m4a1 but still i didn't receive the grey colored m4a1 title. is this a glitch or a bug? i don't wanna waste my time leveling up my weapons for titles that i won't get.