This gas block replaces your existing front sight and provides a picatinny rail on the same plane as your flat top AR receiver. It clamps to the barrel using 3 Allen screws. This gas block has a bore diameter of .936 inches for bull barrels. Gas port size: 0.125"
Manufactured from aluminum and finished with a matte black anodize. Made in the U.S.A.
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Outstanding Work
Perfect fit snug to the barrel. Not too tight, but defiantly perfect. Thanks for a well built product.
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Well made
Excellent product and looks good too.
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Right part at the right time.
Needed a method to attach BUIS to a special made Remington 870 barrel 36 inches long. The barrel measured 1.002 OD and after boring the ID there was plenty of metal remaining. Only problem was I had to use one of your risers on top of a picatinny receiver mount to co -witness the rear sight with the front. Thank you for having the parts I needed to finish this build.