Rugged Suppressors Obsidian Dual Taper Friction Mount, Compatible with Rugged Muzzle Devices ODTM001 The Obsidian Dual Taper Mount is a friction lock type mount for our Obsidian9 and Obsidian45 suppressors. When paired with any Rugged Dual Taper Mount muzzle device" you can now use your Obsidians on hosts such as 300 BLK rifles" PCCs" and .357 lever actions with ease. Installation tool included.