I can find mildot ‘scopes & I can find rimfire ‘scopes, but I can’t seem to find mildot rimfire ‘scopes. Any suggestions? This would be for a Savage Mark II TR 'trainer'. Also what’s the deal with the >Burris 3-9x40mm Fullfield II Rifle Scope w/ FREE 3x-9x40mm Rimfire Scope< deal? Why would they do this?