Adapter:
It only fits Standard Barrel (0.63 inch diameter)
Not fits Bull Barrel (0.92 inch diameter)
High quality Aluminum - Black Finish
Ruger 10/22 Thread Adapter to 1/2"x28, Adapts Ruger 10/22 for 1/2"x28 Accessories
Tightens in place with 3 Black Set Screws
Allen wrench Included
Muzzle Brake
Thread Pitch: 1/2x28 TPI
Material : Aluminum T6 6061
Competition Muzzle Brake
Reduced Back Pressure
Weight: 0.8 oz
Length:1.374 inch
OD: 0.937 inch