If you have Weaver Scope bases on the Ruger American Compact Rimfire the Weaver Cross Lock Rings 1" diameter medium or low height models will work with the Vortex Crossfire II 2-7x32mm Rifle Scope. However, if you do not have Weaver Bases on the rifle and are using the dovetail mount then these rings will not work. You will need the rings at the link below.
https://www.opticsplanet.com/burris-airgun-rimfire-signature-1-rifle-scope-mount-rings.html
That will depend on the size of the objective lens on your Vortex Crossfire II. There are 40mm and 50mm models of the 3-9 Crossfire II. If you have the 40mm version, then you will need medium height rings. If you have the 50mm version, then you will need the high height.
For a scope with a 40mm lens, you will need medium height rings.
High height rings would be best for a scope with a 50mm objective.
Medium height rings will be the appropriate height for your scope.
Please email us at techsales@opticsplanet.com for further assistance.
Please email us at techsales@opticsplanet.com for further assistance as we will need the tube diameter of your scope for proper fitment.
You will need extra high height, you will see a blur of the front sight in the lower portion of the optic.
MPN: 49321 are the only silver option on the page. They are silver.
You would need MPN: 49305 for the high height.