The best QCQ171 build in Delta Force can dominate close-range fights with ease. Added with the Season 2 Starfall update, the QCQ171 is the latest SMG to join the game.

QCQ171 Submachine Gun-Warfare-6F2V8KC09B793ILS11ON5; Copy this entire code and import it into the loadout section of the gun after maxing out the weapon at level 73.