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Rusty AR barrel

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Rusty AR barrel

Postby longrifle » Mon Apr 17, 2017 6:08 am

I just got back into shooting after a year off because of a disagreement between my motorcycle and a truck and noticed one of my AR barrels filled with rust. I have not found any other firearms with the slightest bit of rust besides this one. The only difference between this and my other AR is that I run a 22 rim fire adapter in this rifle and not the other one. The were kept side by side in a locker with a dehumidifier, in a basement with 2 dehumidifiers running, and I ran an oily patch through them after the accident but do not remember if I cleaned this one good or not. The only thing I can think of is that something in the rim fire ammo caused the corrosion. Has anyone else had a similar experience?
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Re: Rusty AR barrel

Postby Fullmoon » Mon Apr 17, 2017 10:11 am

Were you shooting foreign made 22 ammo? If so there is no telling what they used for a primer material. All of the ammo I see lately is made in a foreign country and there have been many that don't go bang. I had some Winchester made in Australia that had a 10% misfire rate, will never buy it again. Some companies still use mercury for primer material and it will destroy your bore if you don't immediately clean it after firing.
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Re: Rusty AR barrel

Postby Dirk Williams » Mon Apr 17, 2017 11:26 am

Hey, Long, welcome home. Sorry to hear about the bike/ truck gig, that had to leave a scratch. Glad to hear your shooting again. Best to you.

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Re: Rusty AR barrel

Postby IceFire » Mon Apr 17, 2017 8:05 pm

Glad to see you back, longrifle! Truck/motorcycle "disagreements" can be VERY nasty, with the MC usually losing the argument. Hope you're fully recovered, or at least mostly so.

Some ammo is "dirtier" than others, and needs more serious cleaning of the bore than with "cleaner" ammo, or corrosion can definitely be an issue. Whenever we shoot, (especially with the "dirtier" ammo) we take our guns OUTSIDE (because this is MESSY and you do NOT want to be doing it in the house!) spray Break-Free CLP down BOTH ends of the barrel until it is DRIPPING, then let is "set for several minutes to soak in. After that, we use the copper wire "brush" rod attachment, and scrub it REALLY well, follow up with bore snake/wool mop, then run a patch through. If it comes out dirty, repeat until the patch comes out clean.
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Re: Rusty AR barrel

Postby danthman114 » Fri Apr 21, 2017 7:51 am

If you're running corrosive ammo you have to remove the salts. Regular solvents dont do this. The cheapest way is hot soapy water or Windex. If your is rusted it needs replaced unless accuracy is of no concern.
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