The combat pistol in Grand Theft Auto 4 is based off of the Desert Eagle. The combat pistol has 9 bullets per clip and has long accuracy and strong power. Below is a map of all of Liberty City that has each location for the combat pistol denoted on the map. There is also a picture of where each combat pistol is, a zoomed in picture of the location of the combat pistol, and a zoomed out picture of the map for where the combat pistol’s location is. There is also a description describing the location of the combat pistol which describes where you can find a combat pistol in GTA 4. The combat pistol is in the same location for the add-on content to GTA4, such as The Lost and Damned, as it was in the original episode for Grand Theft Auto IV. For instance you will notice that these pictures were taken as The Lost and Damned character Johnny.
In Industrial, Bohan on the left side of the last broken part of the unfinished overpass is your weapon, the combat pistol, that you will find for pickup. This is the right next to the ramp for Unique Stunt Jump #4.
In Francis International Airport, Dukes on the northern part of the many silos and towers that are clumped together there is a ladder that leads to a narrow platform that runs in between all of them. At the end of the platform is your weapon, the combat pistol, that you will find for pickup.
On Charge Island on top of the third large storage tower to the north (the one that is furthest south in the group of three) is your weapon, the combat pistol, that you will find for pickup sitting on the railing. You can get on top of the storage tank from a ladder at its base. It is right underneath a walkway that leads from the storage tank to around the top of the power plant.
In The Triangle, Algonquin in the area that the road is being worked on and there is a sky crane there is a concrete building that stairs from the sidewalk going to the second story of it that has a walkway. You will know the building as it has a billboard for the car the Dilettante. Once you are on the second story head towards the side that the billboard on it and sitting on the railing is your weapon, the combat pistol, that you will find ready for pickup.
In City Hall, Algonquin off of Calcium Street there is a courtyard for eating in the middle of a three part skyscraper. As you face the courtyard, on the left side of it between a plastic table and chair set and an empty planter box is your weapon, the combat pistol, that you will find for pickup.
In Acter Industrial Park, Alderney there is a very large storage tank in the southern part. Climb up the stairs that wrap around it and on top in the middle is your weapon, the combat pistol, that you will find to for pickup.