Gas Port Sizes for 6.5 Grendel barrels?

**Howling Coyote** · 12-09-2018, 07:14 PM

My 20" barrel with rifle gas length is .093 (3/32").
My 16" barrel with carbone gas length is .0625 (1/16")

**bigdaddyflo** · 12-09-2018, 07:23 PM

Some good info on this thread...

Of SBR's and gas port sizes - 6.5 Grendel Forum : : For the 6.5 Grendel Aficionado

http://www.65grendel.com/forum/showthread.php?14132-Of-SBR-s-and-gas-port-sizes&p=156627#post156627

Ok, so here is the setup. I have a Sabre Defense M4 upper, 16", carbine gas, stock carbine spring and H buffer (the spring and buffer can certainly be replaced). I am trying to decide to what length I want to cut it back to, 14.5" or 10.5". I plan to run it with my Rugged Surge .30 cal suppressor. Not wanting to

**LRRPF52** · 12-19-2018, 03:53 PM

General speaking, if going off of Bill Alexander's extensive developmental work on setting up gas ports:

20" RLGS .0935" (like on a 5.56)
18" MLGS .076"
16" MLGS .076"
16" CLGS .0625"

My Faxon 12" CLGS group buy is .068", runs great suppressed and unsuppressed so far.

These barrels and ports will generally drop onto an existing lower whether it has a carbine RET, 2.0 ounce buffer, and Mil-Std carbine spring or a rifle RET/spring/5.1 ounce buffer.

Gas Port Sizes for 6.5 Grendel barrels?

Gas Port Sizes for 6.5 Grendel barrels?

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