One suppressor. Countless caliber possibilities up to .338 Lapua. This is the first suppressor to use the Rugged Universal Mount, or R.U.M., which offers back-end modularity by allowing the Alaskan360 to work with all Rugged rifle and industry-standard mounts. Furthermore, the mount is built from US Grade 5 Titanium and is one of the lightest on the market, and when combined with the Alaskan360, the suppressor weighs only 11.8 ounces. . mannersstocks stilleractions leupoldoptics eberlestock . #ruggedsuppressors #liverugged #alaskan360