I have a bug with fas:2 weapons

Hello to all, first thanks in advance for helping me with my problem and this is my first theme. you will see I have a problem with fas:2 weapons, brought a weapon and model breaks, appears for the second time, on top of that when you change your weapon to the keys or any other item, stays in the last time that you got the gun, images herein, I have deleted the addon multiple times and rebooted a few times, had never happened to me It is not a mistake of mine, other users also happens.

Best Regards.

[editline]3rd April 2016[/editline]

Another thing that is worth mentioning is that they are by default, not have touched them the lua or no error.