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9/22/2017 12:11:25 AM
Posted: 10/15/2003 8:11:38 PM EDT
I just got my bushy M4gery back from Kurt who put one of his great A3 TacBrakes on it. When I shot it, the handguards would start smoking a lot after maybe 15-20 rounds of firing perhaps 6 shots per minute. Before I sent it off, the rifle didn't do this after even 90 rounds rapidly fired. No cycling problems or anything, but a lot of smelly, white smoke.

Any thoughts?
Link Posted: 10/15/2003 9:12:57 PM EDT
If he took the barrel off and then reinstalled it, maybe it is a little of whatever was used as antisieze (often motor oil) burning off.
Link Posted: 10/15/2003 9:28:37 PM EDT
It is probably just oil burning off. Heat it up and watch the smoke pour out. Gets some great looks at the range [:)]
Link Posted: 10/15/2003 9:48:56 PM EDT
put a protective coat of oil on your barrel and then fire 40-120blanks (blanks just because they seem to heat quicker) and the barrel will smoke pretty good (as oil evaporates). . . Then it will stop and for 100-300rds it will be gone and then a different kind of smoke can appear (slight melting of the handguards.) This is where you probably want to stop firing if you don't want to destroy the barrel or find yourself cleaning melted plastic off the barrel nut.
Link Posted: 10/16/2003 6:12:08 AM EDT
White smoke is usually oil burning off the barrel - though the round count is way too low to be CLP smoking off. I'd second the guess that it is some type of oil used in installing the barrel burning off. Black smoke is your handguards and/or the glue in them burning. This is the gun's way of saying "Stop it, you are hurting me!". [:D] You will generally only see this under extreme firing schedules (7-10 mags as fast as you can).
Link Posted: 10/16/2003 6:31:27 AM EDT
Ok, thanks guys. Hopefully then I can just burn it off.
Link Posted: 10/16/2003 7:58:36 AM EDT
heheheh... Someting fun to do to new shooters. Put CLP all over you barrel before heading to an outdoor shoot. Bast through a couple of mags. When the gun is smoking, hold it at arms length and ask the new shooter "I wonder if that is normal?" Gingerly load a round into smoking gun. Pull trigger, while at the same time tensing up your body and making a "Oh shit, this is gonna hurt" face. Watch the new guy's eyes get as big as dinner plates. Works every time. Av.
Link Posted: 10/16/2003 3:47:28 PM EDT
I'll let you know if smoking handguards are normal or not when the transfer of my new M16 finally goes through. [:D]
Link Posted: 10/16/2003 5:02:14 PM EDT
According to the Surgeon General, smoking handguards (or smoking any other part of your AR) can be hazardous to your health.
Link Posted: 10/16/2003 5:59:41 PM EDT
[Last Edit: 10/16/2003 6:00:19 PM EDT by southern]
We are doing some super-secret prototype work on a PATCH to help barrels stop smoking, but don't tell anyone. [:D] southern
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