Super low-profile.750 diameter gas block, set screw style, black nitride.American made from american sourced 4140 pre-heat treated steel.8-32 adjustment screw from muzzle end.4-40 locking set screw..750 diameter set screw style.If your barrel is not pre-dimpled, it is recommended that you use a gas block alignment tool.
Finish: Black Nitride Model: Low-Profile Material: 4140 Steel
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