My first SIG purchase, 20+ years ago, was a P210-6 in 9mm along with the .22 conversion. The serial number of the kit is different but both were NIB and the price was phenomenal, especially considering .22 conversions were almost impossible to find at any price even back then. It’s a great combination and definitely a keeper. When SigForum started it was my only SIG, hence the moniker. It had been my grail gun for years.