Carbon build up in FSB/gas tube area?

outrider627 · #1 06-13-11, 19:48

I removed the FSB from the barrel today and I noticed carbon build up on the gas tube right behind the FSB. The carbon extends about .5 inch back on the tube. Is this normal?

Quiet-Matt · #2 06-13-11, 20:02

Not uncommon Outrider.

SteadyUp · #3 06-13-11, 20:08

Yes. It occurs on all of my ARs.

Sgt_Gold · #4 06-13-11, 22:27

Not only is it common, it's almost expected. Perfectly normal.

outrider627 · #5 06-14-11, 00:06

Cool. I thought maybe the FSB was leaking gas. Thanks guys.

CONKLE73 · #6 06-18-11, 16:26

Totally normal...

markm · #7 06-18-11, 16:47

Quote:

Originally Posted by outrider627

Cool. I thought maybe the FSB was leaking gas.

It is leaking gas. Just a little... like almost every AR.

aaron_c · #8 06-18-11, 19:26

Is it advised to clean this up or is it harmless? I ask because I took my rail off a week or so ago and noticed the same thing, but "out of sight, out of mind" took over and I forgot all about it.

outrider627 · #9 06-18-11, 21:22

Quote:

Originally Posted by markm

It is leaking gas. Just a little... like almost every AR.

Carbon build up = gas leak. I'm a dumbass, haha. I was thinking gas leak in terms of something might be wrong or out of spec.

markm · #10 06-19-11, 09:18

Quote:

Originally Posted by aaron_c

Is it advised to clean this up or is it harmless? I ask because I took my rail off a week or so ago and noticed the same thing, but "out of sight, out of mind" took over and I forgot all about it.

It's harmless. There's not moving parts there to be affected by this.