I've found that using layers of burlap then tied on with para cord works, sorta. Anyways it works better than can covers do from my experience and it's a very cheap mod. I wrap quite a bit around my can and it does actually work with mirage to a degree. Keep in mind I'm no suppressor expert and only own one Surefire unit in 556. I got the idea from a buddy of mine who was a SWAT guy using a gemtech urban on his dept. issued 11.5 inch M16. You have to use a bunch of burlap though. layers of it! Looks super silly with it on there and makes people at the range wonder what the heck you're trying to accomplish. So be prepared for lots of wacky looks and questions at the local range. For me personally, mirage is probably the only annoying thing about running a can on an AR15 precision rifle excluding the gas blow back which I've found a great solution for. If you have any questions about gas blow back on an AR15 rifle I can be of some help in that area. Feel free to ask if so.
Edit to add: Be careful getting the burlap too hot it could catch fire. Never had this happen yet but who knows its probably possible if you get the can too hot. I don't have this issue because mine is mounted on a slow fired Ar15 precision rifle.
Edit to add: Be careful getting the burlap too hot it could catch fire. Never had this happen yet but who knows its probably possible if you get the can too hot. I don't have this issue because mine is mounted on a slow fired Ar15 precision rifle.