The SUS-TAC Picatinny Rails are designed to provide a solid base for your scope mounts on your rifle. 

The SUS-TAC Picatinny Rails are also available with up to a 20' MOA negative elevation built into the rail. This allows the the scope to be mounted in a nose down position providing elevation correction. This is especially effective for long range shooting where there are not enough clicks available for adjustment in the scope.