Well crap! I've got a 300RUM Sendero SFII and I had one of the Defensive Edge brakes put on it. Well tonight I just noticed the end of my barrel has a burr on it. I thought WTF, how in the hell did this happen? Then I noticed inside the muzzle brake there are dents in it and traces of copper!! Now I'm really inspecting this thing, right? So now I notice there are two indentations on the baffle furthest from the end of the barrel, and the solid piece on the bottom of the first baffle (furthest from the end) has what appears to be a stress crack starting. The two indentations are nowhere near congruent, so I think they're both caused by stress, but I am no expert. Where do I go from here? Is my barrel going to have to be cut any shorter to have this process redone? If so, I am going to demand a refund, money for a new barrel, and send it off to Shawn Carlock to convert to an EDGE....something I was planning on doing when this barrel was shot out anyways.... In any case...what do you guys think? I think the brake is junk at this point...and if my barrel needs to be cut any....it is junk to me...I don't think I need to suffer from their screw up. PLease, any quick reply is greatly appreciated as I want to contact the shop tomorrow. Thank you!!