Straight shooting. Accurate long distance shooting is a skill and art all its own. Long distance shooters know that in order to achieve consistent hits, every detail must be sorted. Cant error occurs when your rifle and scope are no longer parallel to each other and is more severe the farther away the target is. Cant error can be easily monitored and adjusted for with the addition of a bubble level to your rifle. The Browning Anti-Cant Ring Cap replaces the ring cap on Browning Integrated Scope Mounts and on Precision Scope Rings. This precision device is constructed from 7000 series aluminum alloy and easy to install. The integrated level design is easy to reference and unobtrusive on your rifle.