


I'll add that it was 90+ degrees as well. I know this isn't very scientific, but it was my experience. I'm just more comfortable that way generally speaking. I do fire faster than the people I shoot with. I wasn't just pulling the trigger to see how hot it would get. Once I was finished zeroing, I ran a couple of 30 round magazines through it before it became uncomfortably hot. I didn't sense any heat while I was zeroing the scope again, but I was not shooting that much and there was a lot of downtime while I checked targets and what not. I picked up a 15" model for my 18" barrel. So its a valid question regardless of your snarky non-technical response. Its an important factor when you will be running your gun a lot. Some get hot to the touch almost immediately and some do very well at sinking heat away. It has been reported and tested that various free float hand guards react differently to sustained fire. If heat is that big of a concern then don't use metal handguards, or shoot less. Just like every other slim aluminum rail/tube out there.
