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Old 10-25-2012, 12:38 PM   #11
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Never actually heard of a stoppage from the gas tube being clogged up. The only gas tube issues I have seen have been when the barrel nut wasn't lined up correctly, and it pushed the tube out of alignment with the gas key, causing leakage. If properly installed, you will never have to touch the gas tube unless you change barrels. I just do it at the end of a shooting because I don't want carbon in my rifle. One second squirt and I am done with the gas tube.

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Old 10-25-2012, 03:15 PM   #12
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I have personally seen, and changed the gas tubes on, SBR's that have had reliability issues from gas tubes caked with crap. Granted, these were police guns (Pierce County SWAT) that saw many times the number of rounds an average shooter would put through a plinker.

A shot of brake cleaner or other solvent and a long pipe cleaner is all you need. Takes about 15 seconds. Then a couple of shots of compressed air and you are good to go.

For just random plinking and shooting less than, like, 10,000 rounds a year, I would agree you don't need to clean them.

With a lot of .22lr going through them, I would recommend it.

JD

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Old 10-25-2012, 06:51 PM   #13
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Quote:
Originally Posted by Dillinger View Post
I have personally seen, and changed the gas tubes on, SBR's that have had reliability issues from gas tubes caked with crap. Granted, these were police guns (Pierce County SWAT) that saw many times the number of rounds an average shooter would put through a plinker.

A shot of brake cleaner or other solvent and a long pipe cleaner is all you need. Takes about 15 seconds. Then a couple of shots of compressed air and you are good to go.

For just random plinking and shooting less than, like, 10,000 rounds a year, I would agree you don't need to clean them.

With a lot of .22lr going through them, I would recommend it.

JD
I am thinking of gettting a .22 conversion kit. If I do, I will get an adjustable gas block so I can just shut the gas off to the tube when I shoot .22 like a friend recommended. Either that, or just build a dedicated .22LR upper that doesn't have a gas port in the barrel (I found a kit that includes a barrel). That should solve any carbon problems in the tube.
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Old 10-27-2012, 10:42 AM   #14
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There are some small bore bristle brushes you can get for cleaning oil holes in an engine block during a rebuild. I suppose that would work. Soak your tube in a strong solvent like kerosene or mineral spirits (kerosene may affect some platings) and then give her a nice bore scrub. I'd make sure you blow it out really good with compressed air afterwards, maybe take a lighter to it, get all the residue off and out of it.

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