Zombie Gunship Survival's excellent v0.6 update

Amongst other things, the v0.6 update of Zombie Gunship Survival has improved the drop rate for weapons, increased the number of weapon items per crate, and increased the strength of the zombie horde. Jon Jordan takes a spin through the changes.
App Store link: itunes.apple.com/app/id101916...
Google Play link: play.google.com/store/apps/de...

[@Anonymous-xt8mh]

I don't get it.. you have the guns.. all you have to do is place it in the slot, and the corresponding troop will appear..