Yes, I forgot about that one. It's the ATI mount. Gets some good reviews as well. Google around, you'll find various reviews out there of all of them. Note that Darrell doesn't have a website, at least not that I know of. As has been said, it comes down to two choices: LER mount that replaces the rear sights, or co-witnesses with them, or ones that require some kind of installation and may/may not require a bent bolt.