Need help with a gas port... [Archive]

View Full Version : Need help with a gas port...

bigfelipe

11-03-09, 20:30

Can someone please tell me the proper measurement from the contour that holds the handguard cap to the center (or edge) of the gas port on a 16" M4 barrel? Please don't direct me to ar15.com, it's useless in this instance. I've asked around everywhere and can't get a straight answer. I need someone with barrels to compare or something or a barrel blueprint that's not CAD. Thanks.

Todd.K

11-04-09, 11:31

.295" to center

bigfelipe

11-04-09, 14:30

.295" to center

Thanks. Mine is around .220" to center. Things are starting to make sense now.

Big fan of the KX3 "flaming pig" flash suppressor BTW...

bigfelipe

11-04-09, 14:41

.295" to center

Forgot to ask... This is a standard measurement right? Should be within a 100th or so on any brand right?

Todd.K

11-04-09, 15:26

plus or minus .005"

That is the standard for use with a FSB and handguard cap.
Our Stainless barrels are made to fit our gas blocks without the HG cap so they are different.