AR Gas Block Aligner for 5.56 by HB Industries 

Ensure perfect alignment between your AR15 barrel port and your gas block. Our alignment pins can be used universally between any standard 3/4″ inner diameter gas block and barrel combination, regardless of manufacturer. Please see our video for a demo on how quick and easy proper gas block installation can be when using this tool.

• .223, 5.56, or any other .22 caliber round.
• Low Profile, Adjustable, Flip-up Sight Blocks.
• Use with any 3/4″ or larger diameter barrel.
• 6 pin diameters for precise alignment.
• Mark and dimple barrel, perfectly every time.

Designed and Manufactured completely in USA.

Gunsmith Installation Recommended for All Parts.