In the latest update of Creative Destruction, a Thanksgiving event was released. If you are one of those who really likes skins, you might want to take a look at this one.
All you have to do is complete different daily challenges which you find under the Thanksgiving Medal Spree tab under the Event list.
When you complete missions, you earn medals which you can exchange for some different weapon skins.
As you can see you can get two different permanent AK-47 skins which both cost 15 medals. This event only lasts until the 29th of November so be sure to do this event before it ends.