WooHoo. Just set NEW Weapons System.
You can pick up and loose guns in the ground, drop your gun on the floor of the scene and pick up weapons that enemies are using or that they drop when killed.
I'm testing here. After theses tests we will release a New Update =)
There is another new thing: when the player shoot, he makes a retreat back (is the famous knockback =)
(game feeling makes all the difference)