I think mine was a model 1911. I think they used the same action on the later models. For just regular shooting, it was fine but the case head was not totally supported which meant you did not need to load it hot. Also the rear locking lugs didn’t help.
I believe the barrel was 31 inches and even with that long barrel it really roared when fired.
The Schmidt-Rubin and the later K-31 used the same style action, but the K-31was an updated design that had no parts commonality. I believe they took care of the headspacing and locking lugs issues on the K-31 as well.
CC