I have a Barrett MRAD with barrels in 6.5-CM, .308, .300-WM and .338-LM. I've had super reliable components thus far, but have called Barrett Customer Service for help with a couple of things (removing a stuck muzzle brake and adjusting the trigger). They pick up the phone, get me quickly to an expert, and twice now have solved my problem on the first call. No issues at all, and I absolutely LOVE the rifle. It's a modular form-factor that is just awesome. Changing barrels and bolt heads is literally a 3-minute job.