The SIG SAUER line of SLH suppressors is specifically designed to achieve a balance between maximum sound reduction and reducing the amount of gas flowing out of the ejection port and charging handle area of an AR-style rifle. The SLH design focuses on providing the quietest shooting experience possible while redirecting much of the toxic gas away from the shooter. The SLH suppressors are also constructed with a mix of Inconel alloy and Titanium, which delivers an extremely durable suppressor that is also lightweight. https://www.sigsauer.com/slh-suppressor.html