Sorry, I thought it appropriate to have a backup. While Dodgers isn't an officer per-se it would be easy to buy one or acquire one through various means. A 1911 would be a good choice, especially with ammo in the area. I also never indicated that it was "issued" to him. 

I also wonder if anybody else besides the pigman and his assistant are carrying ammo for the pig. From what I haven heard it was common practice for others in the unit to carry supplies for some of the others, sharing the load, such as extra ammo for the pig, extra mortar rounds if there's a mortar team, extra rifle grenades, and so on. I've seen some of this from modern combat footage as well. It doesn't seem like people are carrying much extra here, but it was a thought I figured I would share.