I was putting a muzzle brake on a brand new Spikes Tactical barrel and broke off the protruding notch that sits behind the barrel nut and keeps the barrel from spinning (sorry, I can't remember what it's called). I am a decent sized guy but can't believe I used that much torque. Well... I'll let you know if Spikes will warranty it or not. Hmmmm... Still scratching my head on this one.