Tiger Rock AR-10 /LR-308 Birdcage Muzzle Brake for 5/8x24 Pitch 5 Ports Cerakote OD Green Small. It's constructed of solid 4150 steel and has a high quality ODG Cerakote finish. Fitted steel crush-washer not included. Specifications for Tiger Rock AR-10 /LR-308 Birdcage Muzzle Brake for 5/8x24 Pitch: Manufacturer: Tiger Rock Finish: Cerakote Fabric/Material: 4150 Steel Threads per Inch: 5/8x24 Gun Make: AR Platform Gun Model: AR-10 Features of Tiger Rock AR-10 /LR-308 Birdcage Muzzle Brake for 5/8x24 Pitch Birdcage with 5 slots & solid bottom Package Contents: Tiger Rock AR-10 /LR-308 Birdcage Muzzle Brake for 5/8x24 Pitch What firearm models does the manufacturer say Tiger Rock AR-10 /LR-308 Birdcage Muzzle Brake for 5/8x24 Pitch is compatible with? The manufacturer says that Tiger Rock AR-10 /LR-308 Birdcage Muzzle Brake for 5/8x24 Pitch is compatible with AR-10Tiger Rock MBR05-308-ODG: AR-10 /LR-308 Birdcage Muzzle Brake for 5/8x24 Pitch 5 Ports Cerakote OD Green Small