These come equipped with a Rearden Atlas thread adapter, and include a 1/2-28 LPM Eclipse flash hider, and a 5/8-24 LPM Liberty Bell muzzle brake. The Anthem 2 silencers are designed around the following requirements, in order of importance: Maximum sound reduction for a given length Maximum strength for a given weight No negative impact on accuracy Maximum visible flash signature reduction Low blowback for gas operated firearms Progressive baffle design and spacing allows us to tune the silencer for the various pressure regimes and gas dynamics experienced over the length of the silencer. The Anthem 2 series of silencers have market leading efficiency across many cartridges and firearm hosts. Features and Specs: 1.74″ Diameter 6.85″ long (no rear mount), 7.35″ with included Rearden Atlas 14.2 ounces (no rear mount), 15.8 ounces with included Rearden Atlas Graphite Black Cerakote™ finish Full-auto rated No barrel length restrictions on any .30 caliber (or less) cartridge Removable front end cap with 3/4″ socket Lifetime warranty guarantees our products to be free from defects in workmanship and materials. This warranty covers everything except willful destruction and normal wear and tear