I found the code for the nailgun online and decided to give it a shot, and though it is sometimes useful, truthfully it's given me more trouble than it's worth. The nailgun is impossible to drop. At any given time I am able to carry the nailgun and one other weapon. He will not swap the nailgun for any other firearm (I can pick up shotguns but as soon as I need an axe or a firepoker I have to drop it, either permanently or temporarily.
Has anybody else had this problem?