Trick Shot achievement in Call of Duty: Advanced Warfare

First get the KLO-Trident from the 3D printer then run a train, the best place is in the Spa, now run to the wall, face it and, start shooting the wall, keep doing this while upgrading your weapon underneath the Exo-suit and you shouldn't have problems getting this. It has to be completed in one game.

Note. Take advantage of the open fire power ups start blasting the walls and nothing will touch you.
Good Luck!