Well, I don't have a complete Colt Handgun, but do have a Colt AR and a Colt slide on a Rock Island frame. I call it my Rock Island Colt. Also have a Remington Rand slide on a Rock Island frame. I was given the slides so I felt obligated to put them to work.
These are just listing handgun brands, a long gun list will be much longer. Roughly in the order of quantity.
S&W
Taurus
Ruger
Para-Ordnance
Thompson Center
Sig
Rock Island/Colt
Rock Island/Remington Rand
Glock
FEG/Interarms
NAA
Heritage Arms
Tanfoglio