Rugged Suppressorss RUM002 R.U.M 1-3/8''-24 Tpi Titanium. U.M 1-3/8"-24 tpi Titanium - Designed with versatility in mind the 1.37524 Rugged Universal Mount or R.U.M. is made from US Grade 5 Titanium. The R.U.M. is compatible with Ruggeds Dual Taper...