RE: 1911 .45 to .22 kit.
The only one I was half way familiar with was the original one by Colt.I believe to was called the Colt 22 ACE.Last one I saw was going for big bucks.I really don't know how they performed. For what they were asking for the Colt Ace conversion,you could buy a new gun in 22 caliber.It was in the upper hundreds.I personally don't think they were real efficient. Don't remember many of them being sold when they were available. The GS I worked for at one time was a Colt Distr,I remember some of them coming in.Don't know if we sold them or went to another dealer.I wouldn't be interested in one myself.
Ruger Redhawk