Folks--

I can speak for the M3 mount which is more of a Korean War weapon. The M3 mount will take the Redfield Junior rings for the M73, M82 and M84 scopes. The M3 mount will along take the commercial 1 inch Redfield and Leupold rings. The scopes are protected for ejected cases by the mount itself which directly under the scope. I have not seen any information that the M3 scope mounts were used with these scopes or commercial scopes. I can imagine that some enterprising GI putting one together. I don't think it would be practical since each time you removed the Infrared scope and regular scope they would have to be re-zeroed. Additionally, I believe the earlier Infrared scopes and their accessories were classified pieces of equipment and treated as such. The M3 Infrared Scope while not classified was a sensitive piece of equipment which included the scope mount. The scope mount would have not been generally available to the average Joe as it was a part of the M3 equipment package. The M3 scope mount does fit commercial Redfield bases as I had a Redfield Widefield 1 3/4 to 5 power zoom scope with a cross hair and post reticle on a carbine for many years. I had the Infrared scope as well.

--fjruple