Black Dirt Riflework's Big Bore A2 "Bird Cage" device is manufactured to exactly the same dimensions as the standard issue muzzle device found on most U.S. military issue M4 / M16 rifles, threaded in 5/8x24" for 30 Cal AR10 rifles and is features a magnesium phosphate finish for the ultimate in corrosion resistance and durability.
- A2 "Bird Cage" Style muzzle device for 5/8" X 24 Threaded Barrels.
- Internal Bore Diameter: .5759"
- 17-4ph® Heat Treated Stainless Steel
- Magnesium Phosphate Finish
- Includes Crush Washer