[cliffsta]

Done a LOT of searching on the web and can't find an answer.

I wanna buy a YHM gas block with flip-up sight since I"ll be springing for an optic soon. The YHM gas block has a .750 bore diameter for the gas tube. Is this the standard size gas tube for all carbine-length ARs? Specifically my 6920.

I just don't wanna go through the hassle of ordering an expensive part to get it home and find out its the wrong size.

Thanks in advance.

[Atomic Punk]

i think the .750 bore diameter is referring to the outside diameter of your barrel, not anything to do with the hole for the gas tube.

[m2hmghb]

The .750 is the size of the barrel it will fit. I believe there are two other sizes, one a .625 and the bull barrel at .936.

[mvician]

The .750" YHM flip/gasblock will fit your 6920 barrel.

[faawrenchbndr]

Gas tube diameters are standardized. Barrel diameter is the concern as others stated above.

[cliffsta]

Oh okay. I was clearly confusedx10

Thanks for answering this question guys.

[CigarandScotch]

You'll like it. I just put one on mine and it works and looks great.