Sorry it not legal in Minnesota " Prohibited: Handguns (other than antique firearms) where the frame, barrel, cylinder, slide or breech-lock is composed of any material with a ******** melting point of less than 1,000 degrees F, or an ultimate tensile strength of less than 55,000 psi, or comprised of any powdered metal having a density of less than 7.5 grams/cubic centimeter.  Prohibited: Walther rimfire pistols, Cobra, Phoenix Arms, ********Heritage Arms, Hi-Point, and GSG rimfire pistols.

Francisco, it is not due to the metal it is made out of. It does not meet Melting Point Laws. Heritage has recently started making "Steel" Framed Pistols that are perfectly legal : heritagemfg.com/product_detail.cfm?prod_id=53