Not knowing for sure what the diameter of that specific barrel is, we'll have to give you the information below. This is accurate for both optic models. Also, our rings will require a 1913 Mil Standard Picatinny rail to be mounted to.
If the diameter of your barrel is .825 or smaller (Sendero Style), you can go with the .885" Low rings- Part number A118
If the diameter of the barrel is over .825, you will have to go with the 1" Medium rings- Part number A101