I have an Obsidian 45 and I really do like it. However, there are two things I don't like about it and I have pointed them out to Rugged (with no response).
The first is that the front end cap should be crowned to protect the front end of the tube. The second is the three lug adaptor does not have positive stops on it, such that it is possible to put the can on the weapon and twist the three lug adaptor past the locking lugs, leaving the can just hanging on the little bit of barrel adaptor without engaging the locking lugs.
The first firing will launch the can downrange and it will (most certainly) land at a 45 degree angle and damage the front section of the can's tube. When the tube is damaged, you can't remove the end cap and you have to send the whole works back to Rugged for repair. This whole scenario happened to me (granted, my fault) and Rugged were REALLY good about repairing at no charge and turning it around lightning fast.
But........crown the end cap and fix the locking lugs and none of that would be necessary. Having said all of this ? Would I buy another Rugged suppressor ? Yes. They make nice stuff.