I don't know of anyone who offers aluminum frames only. That's a real point of frustration for me. I have heard that Caspian does a batch from time to time, but I've never seen one.
There are some 80% aluminum frames that are going around that are pretty darned good. An example can be seen here:
http://www.sportsmansguide.com/product/index/stealth-arms-80-1911-lower-receiver?a=1747831 I picked one up at a gun show, and for the most part it's a very nice frame. These are made from billet, 100% milled frames. The only flaws I can find are:
- The hole under the grip panel is cut just a smidge too far forward. Some grips that are on the smallish side may not completely cover that hole on the front edge. Very minor issue if you ask me.
- The radius on the inside of the trigger guard is missing. The inside of the trigger guard is flat, not radiused.
And that's about it. Everything else is first rate.
To finish the hammer and sear pin holes must be drilled. The slide rails must be cut, and the barrel bed must be cut. I built up a frame to be a dedicated .22lr for my conversion unit. Took just over an hour on my mill at home. These are .45 frames only.
Even in 80% frames, I have yet to see a Commander frame. The Commander frame would need the dust cover cut back and the frame bridge is about .010 farther back on a Commander.
