Bullet Storm part 1

Would like to report a bug where in the challenges section, under Bullet Storm 1, the one required to unluck the KTS 100. It tells me im required TO SELL MY SOUL, QUIT MY JOB, AND INTENTIALLY MISS MORE BULLETS THEN I HIT?!! FOR 5 YEARS STRAIGHT??? I loved this gun and I cant wait  FOR MY GREAT GREAT GRANDCHILDREN to unlock it for me. There are people max level that dont have this gun, I ONLY PLAY MEDIC, LITTERLY NOTHING ELSE and im not even scratching the surface of thinking about having the thought of unlocking this gun.