Unrivaled A2 Suppressor Adapter Siege Brake .223/5.56 1/2-28 Threads. . Established by using some of the most extremely durable and dependable resources available these Muzzle Brakes & Compensators from Unrivaled will present you with an item which will give you a great deal of stability. Unrivaled has been developing superior quality merchandise for a number of years and the Unrivaled A2 Suppressor Adapter Siege Brake is their particular way of revealing how much they are concerned. At OpticsPlanet we ensure that it is our obligation to receive the best product for your requirements and exhibiting the Unrivaled A2 Suppressor Adapter Siege Brake is one thing that we are happy to offer. Specifications for Unrivaled A2 Suppressor Adapter Siege Brake: Manufacturer: Unrivaled Caliber: 5.56mm .223 Remington Threads per Inch: 1/2x28 Package Contents: Unrivaled A2 Suppressor Adapter Siege Brake Unrivaled (SBSA-A2-5.56): A2 Suppressor Adapter Siege Brake .223/5.56 1/2-28 Threads