I've been running the Rifles Only covers and had no issues. Mostly hunting hogs in Texas. I was having problems with the heat from the end of the barrel starting to white out my thermal scope after a few shots of a .308 LMT. After putting a suppressor on with a HAD suppressor cover, the heat hasn't been a problem. Plus you can touch the cover and not burn your hand on the suppressor if you've dumped a mag at running pigs.