I just finished building this. My son and his sons are visiting for a week or two and I wanted something we could blast away with but not worry about breaking. I built it out of parts laying around the cave.
Crown city frame, Colt slide with Bomar sights, Colt rubber grips, stainless grip safety, STI trigger, Karl Lippard hammer and sear assembly (3lb pull), Colt Nat Match barrel and bushing.
Trigger feels pretty good, I guess well see.