In zdoom 2.2.0 I don't get it when I type idfa or give bpistol. If I type summon bpistol I can hear it hitting the floor when I have a splash wad loaded but it is invisible and when I walk over it i don't pick it up. I know that I don't have it at all because the icon does not appear in the alt hud. All of these things work in the latest svn versions.
All my sprites are in the file inside proper markers and I have a proper working KEYCONF lump.
Spoiler: