The blue on Brownells says out of stock and the silver is listed as discontinued. Also, I'm trying to get just the base (Weaver PN 48638 blue or 48635 for silver, I'd take either color) and not the set as I really don't care for the weaver style rings and the sight comes with a set of them already so I hate to pay that much extra for something I'll literally throw away. I found a deal on one of these
http://info.sightron.com/Electronic-Devices/S33-4RST/ I couldn't pass up so Invented a 'need' and figured it worth a try on a stainless .44.