Gunsmithing HBAR diameter in from of the gas block.

[jgs8163]

Does a HBAR profile barrel always have a smaller diameter between the gas block area and the muzzle? For instance if I chose .875 gas block diameter on my order will the diameter between the gas block and muzzle be around .860-866? Thanks for the help.

 

[McLarenross]

In general, yes. AR barrels are usually 0.015-0.025" smaller from the gas block seat forward to the muzzle. True HBar contour though is 0.750" gas block and 0.725 to the muzzle iirc.