Originally Posted by
gb6491
I'm of the belief that the AO frame is cast.
As long as the casting is done properly, a cast 1911 frame is not a deal breaker for me. I currently have a few 1911s (a 9mm Rock Island, a Remington R1S, and a custom build with an Essex frame) and I've not had any issues with the frame on any of them. The same can be said for other 1911s with cast frames (excluding an AMT Hardballer) that I've owned in the past. FWIW, the only other 1911 frame I've had a metallurgy issue with was a forged, full size Colt frame. That one developed a crack at the top of the slide stop window....solved that by cutting the top out of the window.
Regards,
Greg