Eh, sorry - that's my fault. We add so few new files to the build that I obviously forgot to add the new weapons files to the distribution. I've now adjusted the makefile to include them. I'll add a check to the build to catch this earlier in the process in case it happens again in the future.
Since this only affected the tarball and not svn, I'm not going to cut a whole new release. I've replaced the tarball on sourceforge with the fixed version.
For whoever was affected, you can grab the new tarball (or switch to using svn) and you should be good to go.