Re: GSG 1911 22LR
I've got one. I haven't had it for long, and only put a few mags through it, so I can't say much about reliability or anything. The little I have shot has been problem free.
It has a magazine safety which I didn't like, but the mainspring housing, which holds the magazine safety mechanism, is interchangeable with a real 1911 MSH, so I swapped in a flat one I had lying around and killed two birds with one stone (Got rid of the extra safety and got rid of the arched MSH).
The Grip safety is ridiculously finicky. I finally got tired of it not releasing, and it's currently held down with a rubber band, until I fix it more permanently.
The grip safety isn't the only part that interchanges with real 1911 parts. I don't have a complete list, but there were quite a few.bbFrom the frame down, mechanically, it's pretty much identical to an actual 1911.
I had a .22 1911 conversion prior to this, but this is actually a better surrogate for my actual 1911 as the slide stop works.