Gemtech Abyss, Rifle Suppressor, 556NATO, Weight 16oz, Length 6.2, Diameter 1.64, Threads 1/2X28, Stainless Steel and Titanium, High-Temp Cerakote Finish, Black 14372 Featuring five of Gemtech's latest patent-pending technologies, the Abyss 5.56 & 7.62 are destined to redefine the hard-use suppressor category. Their proprietary design reduces muzzle flash and decibels while also reducing gas blowback for improved user comfort and host reliability. High Efficiency Baffle Design - For high sound reduction. Low Back Pressure Design-For greater host reliability and shooter comfort. GM-S1 End Cap Design- For minimized muzzle flash from the first shot to the last.