It was a customer's rifle, so I dont all the specifics on it. It is a savage 112 in 300 WM sitting in a laminated stock that has pillar bedding. He said the brake was installed by a guy in Michingan and he also installed the recoil pad. He claimed it had some type of springs in the pad to reduce felt recoil. If you want, I can find out the name of the gunsmith that did the brake. Whoever it was, they did a perfect job installing it. There was no way to see where the brake/barrel connection was. It was a perfect match.