Bowden AR15 STANDARD Gas Blocks are American-made.
American sourced pre-heated 4140 Steel.
Black Nitride coating.
750 diameter set-screw style.
8-32 adjustment screw from muzzle end.
4-40 locking set screw.
For barrels that are not pre-dimpled, Bowden recommends using a gas block alignment tool.
Lok-Tite thread locker recommended for use when installing set-screws.

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