Hi all. If you find your Obsidian 45 fixed mount stuck onto your barrel threads and it requires more torque to remove than you can apply with your bare hands on the outside thread portion, I just uploaded a printable side-wrench that will engage the "teeth" on the rear of the fixed mount and enable you to torque it off. It's printed plastic, so there's a limit to how much torque this will survive, but if it requires more than that you probably want to seek professional help anyhow so as not to damage the barrel threads or the fixed mount. In my case, I'd used some thicker yellow teflon tape on the barrel threads, and while backing the mount back off some of it tore and bound up the threads. I'm a fan of teflon tape better sealing the threads and adding just enough resistance to help the can not unscrew itself in use, but I won't use the yellow tape again. This printed wrench helped me get it off safely. Here's the link.   submitted by   /u/AromaticWriting3843   to   r/NFA [link]   [comments]