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View Full Version : How hot does an AR gas tube get?


a1fabweld
10-03-2008, 10:39 PM
Anyone know? Thanks.

mossy
10-03-2008, 10:59 PM
hot enough to light a match.

gcvt
10-03-2008, 11:05 PM
LOL...I knew someone would say that. I've seen that video too.

triaged
10-03-2008, 11:09 PM
How hot does an AR gas tube get?Very!

a1fabweld
10-03-2008, 11:47 PM
I expected that! Reason is I'm retrofitting both my AR's with DD lite rails & the silver gas tube sticks out like a sore thumb from the side. I thought I could use some 1500 degree header paint to black it out. Can any one be a little more technical than "very hot"?

VAHEVAHE
10-04-2008, 12:00 AM
I expected that! Reason is I'm retrofitting both my AR's with DD lite rails & the silver gas tube sticks out like a sore thumb from the side. I thought I could use some 1500 degree header paint to black it out. Can any one be a little more technical than "very hot"?

The header paint should be more then enough

NeoWeird
10-04-2008, 1:26 AM
I've seen images of FA M16s with litterally red hot tubes.

I'd imagine they could get hot enough to destroy anything non-metalic near them, destroy themselves, and be dangerous to the opperator of the firearm.

Now under normal conditions, I am sure they would hit a couple hundred degrees, but nowhere near 1,000; so header paint should be fine.

Dragon
10-04-2008, 1:28 AM
I expected that! Reason is I'm retrofitting both my AR's with DD lite rails & the silver gas tube sticks out like a sore thumb from the side. I thought I could use some 1500 degree header paint to black it out. Can any one be a little more technical than "very hot"?

Try DEI header paint from Summit Racing ,Its one of the only header paints I have seen actually work on headers ,Ive used it on my cars. Black & silver both.

sb_pete
10-04-2008, 1:55 AM
How hot? Plenty hot.

Seriously though, it's heated by combustion gases from the burning of smokeless powder. Anything made for automotive exhaust manifolds/headers should do the job. I am thinking about it and I don't actually know if gasoline burns hotter than gunpowder. I would guess it does, but I'm not sure. In any case, you figure headers are taking the heat from much more displaced gas (between .4L-1L per cylinder average) per explosion (every other revolution). So 3000-6000 average sustained rpm = 1500-3000 explosions per minute. Figure that vs however many rounds per minute you're shooting and yeah, header paint should be able to take it.

Just make sure you prep the part right.

All that said, I've never tried it so please let us know how its holding up down the line

lakai
10-04-2008, 2:08 AM
shoot a couple hundred rounds and then touch it to find out :43:

a1fabweld
10-04-2008, 2:12 AM
If my tongue doesn't stick to it after a few hundred rounds, it should be ok right?

sb_pete
10-04-2008, 2:15 AM
If my tongue doesn't stick to it after a few hundred rounds, it should be ok right?

LOL, like the gun version of that A1 steak sauce tailgate party commercial :rolleyes:

jumbopanda
10-04-2008, 2:19 AM
I've dumped a couple of mags with a M16A1 and the gas tube glowed orange, so it was probably around 1400-1500F.

a1fabweld
10-04-2008, 7:47 AM
LOL, like the gun version of that A1 steak sauce tailgate party commercial :rolleyes:

Exactly like that commercial!!

hybridatsun350
10-04-2008, 8:35 AM
Next time I go out I'll hit it with my laser thermometer.

X-NewYawker
10-04-2008, 8:38 AM
shoot a couple hundred rounds and then touch it to find out :43:

Reach for a gun in the rack and grab the gas block by mistake and you will know -- DON'T DO THAT AGAIN!

smle-man
10-04-2008, 1:56 PM
I fired about 20-20 rd magazines through an M16 to burn off ammo on the range one day at Ft. Meade many years ago. The gas tube was literally glowing orange not too far through the pile of magazines.