They are making the weapons more firm now. I forgot when the weapons packs are coming out. I want them too, but I think we're going to have to wait until fall.
The weapons are for 1:18th scale figures. Since there is only about a 3/16 to 1/4 difference, the guns work perfectly for Joes. I've been using them for a long time on customs and for all of my everyday Joe needs, period.
To answer another question:
The figures can be found at Babbages and Gamestop. Other video game places like that will probably have them too.