Tiger Rock AR-15 Low Concussion Custom Made Muzzle Brake Compensator AR-15 .223 Rem/5.56x45mm 1/2x28 Black Oxide. The LRMC's nitride finish reduces corrosive elements and prolongs the life of the muzzle brake. Compensators perform best with a two-point attachment system that utilizes a TSP (Temper Temperature Solution). The best way to install this device is with a two-point attachment system that secures the end of the muzzle brake against the barrel. With its pinpoint accuracy this is one of the best values on the market. We engrave each part of the body of the compensator with a Tiger Rock logo and it comes with a titanium blasting cone. Once the comp is installed on the barrel a crush washer (or two) can be used to secure it in place. Tightening the crush washer helps ensure the crush is managed; loosening the clampscrews (or two) can cause the muzzle brake to become too hot and lose the sealing properties. Nitrogen filling is not recommended with this device. Carbon filling is not recommended with this device. Specifications for Tiger Rock AR-15 Low Concussion Custom Made Muzzle Brake Compensator: Manufacturer: Tiger Rock Color: Black Caliber: 5.56x45mm NATO .223 Remington Finish: Oxide Fabric/Material: Solid 4150 Steel Threads per Inch: 1/2x28 Gun Make: AR Platform Gun Model: AR-15 Outer Diameter: 0.9 in Length: 2.25 in Weight: 3.4 oz Included Accessories: None Package Contents: Tiger Rock AR-15 Low Concussion Custom Made Muzzle Brake Compensator What firearm models does the manufacturer say Tiger Rock AR-15 Low Concussion Custom Made Muzzle Brake Compensator is compatible with? The manufacturer suggests that Tiger Rock AR-15 Low Concussion Custom Made Muzzle Brake Compensator is compatible with AR-15Tiger Rock MBR15LCN: AR-15 Low Concussion Custom Made Muzzle Brake Compensator AR-15 .223 Rem/5.56x45mm 1/2x28 Black Oxide