I have a CMMG .22 Conversion kit and have been very happy with it. My son has one and my son-in-law has two and they are very happy with them. I think that I am in the market for an extra. Palmetto has the regular CMMG kit with 3 mags for $169 or the stainless with 3 mags for $199. I clean and lube the kit after every shooting session and if it is a long session, pull the bolt carrier/conversion assembly out and spray with CLP, wipe, and get back to work. What would be the benefit of the Stainless?