(Left Handed) Surefire X300UA/UB Thumb Release Holster – HUSH HOLSTERS
www.hushholsters.com
I pulled the trigger on this to try out before I start putting some funds away for an Obsidian 9. I really don't like the idea of not being able to holster a pistol with some level of retention and this seems to be a good solution, apparently they just started selling this about a month ago. When I get it in hand and I do some testing I'll update this post.