If you actually play the live game and not use a cheat mod you will soon realize that you can't do this.
EDIT: I retract my previous statement. If they you queue them both up at the same time they will both be equipped. This has been fixed and will be patched in a hotfix scheduled for later this week.
Neat! Are you guys aware of the Volksgrenadier Vet4+ bug that removes the panzerfaust ability on them, or the USF 81mm mortar having an autofire range of 120mm? (These were mentioned on the shoutbox earlier, and they also turned out to be true when I tested them.)
Edit: the ones who found this were Syllabeer and RedT3rror, respectively.