Actually, the Browning .22 is all aluminum, if memory serves, although they do now have a polymer-framed version. So no 'pot metal'.
Larry
I wonder how the Browning 1911-380 will compare to the Rock Island Armory A380 Baby Rock? Here is a link that has a quick preview of the RIA A380.
http://www.gunsandammo.com/video/fir...380-baby-rock/
^ Aluminum frame and nickel plated and I'd be all over it.