I have a number of customers very pleased with the CCF frames. They are of course heavier but eliminate half the recoil and muzzle flip.
They may require a little final fitting...
The stainless steel does rust so consider having it coated.
They are in use by a few police departments...I have seen them in green and matte blacl..all finished in BEAR COAT, THE ULTIMATE ALL WEATHER FIREARMS FINISH
Some require replacement recoil springs & guide road....the Glock plastic ones seem to break pretty easy on the CCF frames.
As far as function...they run 100%. I would recommend changing out the factory barrel to LoneWolf after-market barrel for safety. Especially if you shoot reloads and/or lead bullets.