These full auto covers have a inner core insert that are made for the heaviest rate of fire possible for any suppressor cover system. These will handle up to 3500 degrees. Protect yourself and your gear from harsh burns. Each kit comes with a full auto inner core, 8 foot of Paracord and 3 of the strongest Cinch Straps we could possibly find. This Alpha suppressor cover kit allows you to make your cover look and function however you need, making it the most user friendly and versatile cover on the market. This product is backed by a lifetime warranty.