Biggest deal to me is the Remington frame and maybe the slide too are cast. The Springfield slide and frame are both forged in Brazil and most of Springfields guns are assembled here. both makers use mims parts as does every one else unless you spring for one of the high end custom makers. I buy only Colts and have the slide stop, sear, disconnector, safety and hammer replaced with forged parts by a 1911 competent smith. (usually Cylinder and Slide). Admittedly expensive but I feel better in the knowledge that I have what Mr. Browning intended, and, it is my money.