step 270 the tracking assembly 100 may then be retrieved to the surface by activating the wireline tractor 120 in a direction away from the platform 180 at step 280 additional sections of the stackable gun system 170 may be coupled to the tracking assembly 100 run into the well bore 110 and connected to the other sections of the stackable gun system 170 in the same manner as is described above in one implementation the gun sections may be latched to each other by the use of connectors which are described in more detail in commonly assigned u s pat no 6 059 042 entitled completions insertion and retrieval under pressure cirp apparatus including the snaplock connector which is incorporated herein by reference one or more sections of the stackable gun system 170 may be retrieved using the tracking assembly 100 at any time during this deployment process at step 290 a firing head assembly may be run into the well bore 110 and be stacked on top of the stackable gun system 170 the firing head assembly may be any type of firing head assembly that may be used inside a well bore such as a pressure actuated firing head assembly and the like the firing head assembly may then be used to fire the stackable gun system 170 fig3 illustrates a.