User blog:Flamesword300/what would be the most fastest killing balanced weapon ever in COD/FPS possible in your opinion

I wondered what would be the best weapon you could make without it being OP? honestly in my opinion it would be a fast shooting high damage weapon with good penetration. Balanced for slow reloads, fast ammo depletion,high recoil short effective range and a slow drop switch time(putting it away) What would it be for you?