I don't know, but the Natural is great. Replacing the contacts with unplated brass is easy-peasy. Just saying ... if you can't find any of the other mods where this is already installed. It just looks so awesome with an AGA or RSST, too. Some of the reviews, too, are just...well...like the spring problem Todd had. I didn't have that problem whatsoever. And while I have grinded down my 510 connector, the original gap wasn't anywhere near as bad as his was. You can be sure that with most inexpensive mods, there will be tolerance issues. I can sit my Smok Telescope unlocked standing up, but my friend can't because his spring is super soft unlike mine; his TS would fire if unlocked.