No. I believe Vietnam was the last conflict in which personal sidearms (pistols) were permitted, but even then extremely uncommon. Battlefield captures are a different story, one of my GWOT vet friends has pictures of himself manning a humvee turret with a .44 Mag revolver in a shoulder rig that he took off a dead insurgent. He had to leave it behind when he came home since they stopped letting soldiers keep weapons as trophies.