The BRIMSTONE 5.56 is constructed of highly corrosion resistant and heat-treated stainless steel and Titanium. The result is superior durability and premium sound suppression with custom ODIN Works engineered baffle stacks. Like all ODIN Works QD suppressors, the BRIMSTONE installs effortlessly yet securely to our OSM (Odin Works Suppressor Mount) 5 with a 3/4' wrench tightened with 30-35 foot-pounds of torque; no timing tools needed. No shims required. OSM included. Whether you spend your time at the range, in the mountains, or somewhere in between, ODIN Works suppressors provide exceptional sound suppression, superior strength, as well as remarkable versatility and value.