Note: This achievement is accumulative through different games and gametypes. It does NOT need to be completed one game.
The only map in the Crimson DLC pack that have detachable turrets is Shatter. Shatter is a fairly big symmetrical map. Gametypes on Shatter include Infinity Slayer, CTF, Extraction, and King of the Hill.
Two detachable turrets are located in the center of the map overlooking the middle platform where the Rocket Launcher spawns. There are also ramps that lead up to the turrets.
-King of the Hill and Extraction are two ideal gametypes for getting kills with the turrets. Enemies will be moving around constantly going for the next objective.
-When in doubt, stand still. Most people will be watching their radars so it's best to wait around corners or camp around the central area of the map.
-When playing Infinity Slayer, try to get the Damage Boost or Overshield ordinance drops. They help out significantly when trying to go for turret kills.