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View Full Version : How do i get heavy heavy crud off of my AR bolt?


Xscmurcielago
10-09-2011, 9:16 PM
I took my rifle apart for a thorough cleaning last nigh (hadnt done more than oil or bore snake for about 300-400 rounds and a couple trips to the range) and when i took the bcg apart i was shocked to see that the rear of the bolt looked corroded! as i looked closer and felt it with a fingernail i discovered it wasn't corrosion but a really nasty looking buildup. it wasnt very thick, but it was so strong that my using a steel brush and a ton of solvent could hardly get any of it off. i resulted in scraping with the blades of some scissors i had handy, and even then it was a total bear to get off.
anyways im kinda freaked out and want to get all of this ***** off asap, even the scissors wouldn't remove it all, and the inside of the carrier is loaded with the stuff.
so is there any type of heavy solvent i could soak the full bcg assembly in that would loosen this stuff that wont damage the finish or hurt anything?
also i noticed the same build up right around the barrel opening where the locking lugs are, and cant get anything in there good enough to scrape much of it off, so if i could i want to soak that too.

any help will be extremely appreciated, thanks ahead of time!

oh and ps, im 99% sure the crap came from the damn tula ammo i had been using a good deal of. which also caused a pretty gnarly lockup last time i was at the range, im glad i finally shot up what i had of it. im definitely not buying that ***** again.

thomashoward
10-09-2011, 9:19 PM
if it is carbon build up try soaking in Slip 2000,that's what it is for
I don't know these days, but a few years ago if you shot the Russian ammo until your rifle was hot, the shellac coating would build and gum up the works.
I have not used Wolf or other for a long time

EL_NinO619
10-09-2011, 9:20 PM
Don't shot TULA. Soak overnight in breakfree CLP

Xscmurcielago
10-09-2011, 9:24 PM
thank you sirs, any idea where i could get enough of either of those producs to fill something i would be soaking them with? or by soak do you just mean apply it and let it sit?

mlevans66
10-09-2011, 9:24 PM
Try simplegreen also but clean it thoroughly after a soak and use a CLP afterwards. Use gloves for all of this!

rero360
10-09-2011, 9:26 PM
No need to remove it, its not going to hurt anything, its just a mixture of carbon and atomized copper from the bullets getting shot down the gas tube back into the carrier. But if you must remove it, I always just used a knife blade or a screwdriver to chip it off my M4 and M16 so the anal retentive, non firearms maintenance understanding supply jockeys in my unit will accept the rifle back.

tomd1584
10-09-2011, 9:26 PM
Just leave it be. It does not affect your rifle's performance whatsoever. It's not worth the cleaning time it takes to get it off.

conanobrennan
10-09-2011, 9:28 PM
frog lube

:hide:

Merc1138
10-09-2011, 9:30 PM
Take a pocket knife and scrape it off. It doesn't take enough force to scrape off that you'll damage the finish. Just go over it lightly.

Yeah, Tula ammo is absolutely filthy(also smells like urine when you're shooting it). Even with the best ammo you're still going to have carbon build up, it just won't happen as quickly.

Xscmurcielago
10-09-2011, 9:33 PM
thanks for all the quick responses, you guys are the best! yea ive seen a bit of crud on there before, but nothing i couldn't get off with a solvent soaked rag and a little man strength ;). oh and yea, that tula smells like cat piss, and your almost guaranteed to die early from the smoke that comes out.

EL_NinO619
10-09-2011, 9:44 PM
I use the Ghetto ultrasonic cleaner. A coffee can with CLP, toss all small AR parts in it. Shake it, leave in sun and over night. Come back and clean later.... Also sweets 7.62 works good, just don't get it on any rubber and clean thoroughly after with clp

triggs75
10-09-2011, 9:54 PM
I use this and works awesome

http://www.midwayusa.com/viewProduct/?productNumber=516729

NYY
10-09-2011, 9:58 PM
just scratch,brush,wipe,soak, repeat.

EvolutionGSR
10-09-2011, 9:59 PM
I use this otis brass scraper. Its basically a brass stick with a flat head. I don't even scrape it completely, just scrape spin scrape spin scrape spin until i get to where i started. Some stays, i get it the next time.

Dhena81
10-09-2011, 10:05 PM
I use this and works awesome

http://www.midwayusa.com/viewProduct/?productNumber=516729

^^^^That looks good.


I've been using my Leatherman MUT with the brass scraper.

esskay
10-09-2011, 10:19 PM
I use one of these. It works great!

It's like using Q-tips in your ears. Not that necessary but totally satisfying! ;)

http://catm4.com/

http://lib.store.yahoo.net/lib/yhst-23055711199818/m-4-features

G38xOC
10-09-2011, 11:12 PM
^ pricey

futurefuture
10-09-2011, 11:14 PM
I use one of these. It works great!

It's like using Q-tips in your ears. Not that necessary but totally satisfying! ;)

http://catm4.com/

http://lib.store.yahoo.net/lib/yhst-23055711199818/m-4-features

Not bad source.

psubond
10-09-2011, 11:41 PM
if you want enough of something to soak it try this

http://www.midwayusa.com/viewProduct/?productNumber=652259

it's old school but it's a big bottle and it works great

themailman
10-09-2011, 11:46 PM
So many people believe the Ar15/M16 family is a fragile gun. Its a rifle designed for war, treat it as such. If you have carbon on your bolt and you want it off, scrape it with something sharp and metal. The Ar will run dirty, will even run dry, and will certainly run with carbon buildup inside of it. Clean, lube it, and get back in the game.

MTran
10-09-2011, 11:53 PM
Soak the crud with solvent of your choice, get a scotchbright pad soak that in solvent. Wrap it around the crud, clamp down with a pair of pliers/channel lock and then just spin the bolt.

h0use
10-10-2011, 5:27 AM
Froglube works pretty good too! Non toxic too.

Nismo
10-10-2011, 5:50 AM
Soak it in a jar of Hoppes 9. Keep that jar for soaking bolts and handgun barrels.

Patrick Aherne
10-10-2011, 6:37 AM
There's no need to clean carbon off the tail of the bolt, in fact, you stand a greater chance of damaging your rifle with scissors, knives, etc. The carbon builds up and then flakes off. Using a hard metal object on your bolt is a bad idea and causes more wear than the carbon. If you must get this stuff off in order to sleep at night, Slip 2000 Carbon Killer, in the 16 oz jar is perfect for this. Let soak for about 15 minutes and presto!

OHW
10-10-2011, 6:38 AM
One more for frog lube. The crud wipes off and doesn't bake on.

97F1504RAD
10-10-2011, 6:39 AM
Here you go try this.

http://www.calguns.net/calgunforum/showthread.php?t=217983

AlliedArmory
10-10-2011, 6:58 AM
I use this and works awesome

http://www.midwayusa.com/viewProduct/?productNumber=516729


This tool work great. They are also vendors here.

http://www.calguns.net/calgunforum/showthread.php?t=217983

The Virus
10-10-2011, 7:03 AM
Buy a piston gun....or start scraping

compulsivegunbuyer
10-10-2011, 7:12 AM
I have an AR that I bought in 1988, yes it's registered, have put many 10's of thousands of rounds through, and have never bothered to clean the carbon off the bolt behind the gas rings. It still works fine. It's a gun, not an eating utensil. I clean my guns when they start malfuntioning. It would be like changing the oil in a car after every trip, unnecessary.

ERdept
10-10-2011, 7:15 AM
Hoppes #9 and Butches Bore Shine.

I combine both and let sit. Then use the copper brush .

Nismo
10-10-2011, 7:33 AM
I have an AR that I bought in 1988, yes it's registered, have put many 10's of thousands of rounds through, and have never bothered to clean the carbon off the bolt behind the gas rings. It still works fine. It's a gun, not an eating utensil. I clean my guns when they start malfuntioning. It would be like changing the oil in a car after every trip, unnecessary.

I see the point but I would like to clean it to prevent malfunctioning. Its like changing your spark plugs in your car before it starts to misfire using the same car analogy.

Speedpower
10-10-2011, 7:41 AM
I use this on my AR bolt, pistons on my SIG556 and AK's, it works great! you'll be surprised!
http://kamikazercracing.com/proddetail.php?prod=6037

Bad Kitty
10-10-2011, 9:05 AM
My cleaning toolbox includes some dental tools I picked up at swapmeet. Good for tartar buildup, good for carbon buildup. Just don't use the same pick for both uses!

NorCalK9.com
10-10-2011, 9:35 AM
Dont k.ow if this helps but on my ak's I fill up a long tupperware container and put my parts in there and soak it in royal purple motor oil for about 12hrs pull it out and its perfectly clean after a wipe down.
I stand behing royal purple motor oil after my first oil change in my mustang we used royal purple when we emptied ir out it broke all the crud out of my car now I use royal purple for everything except showering lol.

P.Charm
10-10-2011, 9:40 AM
I use this and it's sweet!
http://www.botachtactical.com/m4ct.html

jetspeedz
10-10-2011, 9:47 AM
Now if someone made a decent BCG cleaner that would be great. I use the GG&G cleaner and Greg is a standup guy

bender152
10-10-2011, 10:11 AM
I use this.

http://www.botachtactical.com/m4ct.html

I know, I know.. botach. But my order arrived without issue.

http://site.botachtactical.com/yswimages/m4ct.jpg

1911su16b870
10-10-2011, 10:17 AM
Scotch brite scouring pad.

http://www.4mailers.com/Images/ProductImages/3734_xl.jpg

killshot44
10-10-2011, 11:13 AM
I toss the bolt in my stainless media tumbler.....

If you don't have SS, try Bore-Tech's C4 Carbon Remover - works great.

motorwerks
10-10-2011, 11:49 AM
I use this and works awesome

http://www.midwayusa.com/viewProduct/?productNumber=516729

Me too!

popeye4
10-10-2011, 11:53 AM
Here you go: http://www.zediker.com/articles/maintenance_two.pdf

Xscmurcielago
10-10-2011, 12:19 PM
Holy wow! i go to bed and find 41 responses the next day! you guys are the best!
well i guess ive got about 10 times as many options than i ever thought i had when it comes to cleaning this lil lady, there's no excuses any more!
oh and to the couple that suggested just leaving it on there, im not a clean freak that needs it to be spotless. the part that freaked me out was that it was really irregular looking, very close to how rust looks. i just want that weird chit gone, and if it builds up again and its more uniform i wont be so crazy about it.

Thanks again everyone, you rock!!!

SR-71 BLACKBIRD
10-10-2011, 6:02 PM
Here is what I use for that nasty carbon. Less than 3 bucks. Works like a charm.

Harbor Freight (http://www.harborfreight.com/4-piece-pick-and-hook-set-66836.html)

tomd1584
10-10-2011, 7:13 PM
I wonder how many times Pat Rogers cleaned the carbon off of "Filthy 14's" bolt tail during it's 42,000 + rounds?

probably none.

At 28,905 rounds, we finally cleaned
Filthy 14.... We did run a patch
down the barrel twice, but that was all. At
50 yards it still shoots two-inch groups,
and we understand that it might not at
100 yards and beyond, but we are happy
with the fact that, even at 50 yards, the
gun is capable of tighter groups than
most of the people running it.

Just lube it.


Short answer, broke bolt lugs around 16k, replaced extractor/ spring a few times, action spring a few times- all wear items.

http://www.ar15.com/forums/t_2_138/196990_Filthy_14_is_now_over_40_000_rounds.html

hammerhands32
10-10-2011, 7:22 PM
anybody try this yet? I'm not sure if it would take the finish off so could somebody else try it before I do.

http://www.berrymanproducts.com//Portals/0/images/0996.jpg

Jyruiz
10-10-2011, 7:26 PM
I just don't let it build up and I use plastic picks so I don't cause any damage.

AlexKintner
10-10-2011, 8:02 PM
I use a high grit wet/dry sandpaper. The higher the better. Removes the carbon really quick and leaves a mirror like finish.