Burris offers many high-quality accessories for your firearm including these signature offset ring inserts. This system is revolutionary allowing for the best alignment. These rings allow for scopes to be mounted aligned perfectly between the rings and bore. They will pivot within the rings and then return to self-center. The rings are created to prevent the scope from slipping when putting rounds through especially with heavy recoil. They are also designed to help prevent scratching and to protect the finish on your firearm and scope.