Sig Sauer SLX556-QD, Suppressor, 556NATO, Inconel, High Temp Cerakote, Black, 19.4oz, Quick Detach, Includes QD Mount/Muzzle Brake SLX556-QD Sig Sauer's Suppressor line up is intended to meet the demands of the shooter no matter what the environment is and the SLX556-QD is no exception. This suppressor has a multi-flow path that exhausts gasses at a higher rate, resulting in lower toxic fumes venting from the ejection port. The SLX556-QD has a Clutch-Lok mounting system with an intuitive tactile locking ring and infinite radial locking positions. It's constructed of a monolithic core for strength and durability as well as flash reducing end cap design. The SLX is a performance based suppressor and was only designed to run supersonic ammunition.