Guess I'll wait till next week for more rerolls.

I am not a sniper, I dislike using sniper rifles, I hate using DMR slightly less. On my weekly challenges I had 10 kills with sniper rifles and swapped it out and got 20 DMR head shots, I swapped out a air vehicle one as well.
I try and couple of games don't get really anywhere with the DMR's, head shot wise at least so decide to swap it out with my last re-roll and get 20 kills or assist with a sniper rifle!!! lol

So bloody annoying! looks like this will be the last weekly I'll complete till next weeks re-rolls, it's gonna be a struggle!!