This gas block replaces your existing front sight and allows the use of dovetail mounted accessories. The I.D. of the gas block is 0.750" (Fits on a barrel of 0.750" O.D.) Purchase our dovetail mounted flip front sight (YHM-9584) to retain your iron sights.
Made from high quality steel and finished with a Mil. Spec. phosphate coating.
Weight: 4.5 Oz.
Made in the U.S.A.
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Removed the front sight tower and installed the single rail gas block. Easy installation and outstanding performance.