If you are going to be getting a conversion, go with the Spike's or CMMG over the Ciener. You won't be disappointed. www.spikestactical.com They are electroless nickel and don't require the lubrication that the Ciener does. The Spike's also has a few features that help aid reliability and function that you won't find on the Ciener. Their customer service is light-years ahead of Ciener also.... I have 3 of their fine .22 conversions...
Thanks for the info guys. I think if I go this route I will be getting the Spikes.
Fire
I bought a Ceiner because, at the time, it was all I could find.