The SRD45 .45AUTO Pistol Silencer features a Grade 9 Titanium tube and 17-4PH baffles allowing for light weight and durability. The SRD45 features a booster for use with “Browning Titling Barrel” type pistols. A fixed barrel spacer is also available. The SRD45 ships with both .578"-24tpi and M16x1mm LH pistons. The SRD45 can be converted to use with 9mm or .40AUTO host pistols by using the appropriate threaded accessory piston.