Maybe A GLOCK 36.
.The ATI is made SAM of the Philippines. Many folks like them, but I think it's quite a bit of money for a cast frame 1911; particularly when you're in the same price range as known quality forged frame 1911s
I'm quite familiar with 4140 steel, as it is very commonly used for various firearm parts including frames, slides, and barrels. Your links only show that the frames and slides are 4140 steel, and do not specify whether they're forged or cast from 4140. You most certainly can investment cast 4140 steel as well. I'll dig through my research and find where I saw that SAM uses cast frames. At the same time, I'll ask that you look for documentation that SAM's 4140 steel 1911 frames are forged rather than cast.I am not sure where you get your info from but I have two ATI (SAM) products and the frames and slides are made of 4140 steel. I am a design engineer and use 4140 in many of my tool and die designs and it is not cast. Perhaps you can share your source that they use cast frames. Here are links from the SAM website and pistol specs