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Posted: 5/31/2010 4:17:27 PM EDT
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I just looked inside a surefire flash hider/ suppressor mount thaat has maybe 1500 rounds through it, perhaps half suppressed.
I have an identical setup with a few hundred through it. NEW setup: Looking into the flash hider with a light, you can see the crown, the end of the barrel, and the unengaged threads inside the flash hider. OLD setup: Looking into the flash hider with a light, you can barely make out a shiny ring of stainless steel that is the crown, then its a sloping mess- no barrel, no threads, baiscally it looks like it is one piece. How can I clean this? Is it carbon? Copper? Both? help!!!! |
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That's pretty normal. Run a brass brush through the bore chamber to muzzle and don't worry about it.
Getting in there with dental picks can clean it out and may also result in damage to your muzzle crown which will rob you of accuracy. Those are the kinds of things in the Army you'll find someone ordering you to clean- things that likely have little effect on anything and then someone is running a chamber brush on an electric drill as part of an assembly line with random weapons, poking it into the muzzle of the barrel trying to clean a weapon for an inspection the purpose of which is to determine which barrels are servicable.  Breaking things in the interest of making sure they aren't broke
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Quoted:
That's pretty normal. Run a brass brush through the bore chamber to muzzle and don't worry about it. Getting in there with dental picks can clean it out and may also result in damage to your muzzle crown which will rob you of accuracy. Those are the kinds of things in the Army you'll find someone ordering you to clean- things that likely have little effect on anything and then someone is running a chamber brush on an electric drill as part of an assembly line with random weapons, poking it into the muzzle of the barrel trying to clean a weapon for an inspection the purpose of which is to determine which barrels are servicable. Breaking things in the interest of making sure they aren't brokeNo shit! In my last unit after we got back from deployment, some of us had to clean the entire arms room of weapons to turn them into reset. Took us weeks. The officer's weapons were the worst! Thank God we didn't have any crew served weapons. My new unit isn't as anal , but they do make everyone clean their own shit. That's the difference from being at Brigade and at Battalion. I'd take Battalion any day. |
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While I agree that too much cleaning is more harm than good and messing with the muzzle is bad, the OP brings up a good point about the crown.
On bolt guns and other precision rifles that may not have a muzzle device, people are always concerned about the crown. On ARs and rifles with a muzzle device, you really cannot get at the crown and it will get caked on carbon especially if there is a large gap where the muzzle device indexes off the barrel shoulder but there are still more threads on the device left inside. So in reality, what is the point of getting a target crown or specific angle cut if it is just going to get covered in carbon and fuse to the muzzle device anyway? Don't you think that has some effect on accuracy of high end barrels? |
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Quoted:
Carbon on the crown shouldn't effect the accuracy at all. I believe one of Zak Smiths rifles had about a 1/8th in thick of carbon ring around the crown the rifle shot fine. Interesting So what about the situation in which the OP is describing on a suppressed rifle that has a mount that leaves a gap where carbon can build up? I am assuming eventually the carbon will fill in the gap and almost fuse it with the muzzle device itself. Is the reasoning because the very inner part of the crown which is just outside of the bore diameter is the most important part and is cleaned when running patches and an occassional brush? |
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Quoted:
Quoted:
Carbon on the crown shouldn't effect the accuracy at all. I believe one of Zak Smiths rifles had about a 1/8th in thick of carbon ring around the crown the rifle shot fine. Interesting So what about the situation in which the OP is describing on a suppressed rifle that has a mount that leaves a gap where carbon can build up? I am assuming eventually the carbon will fill in the gap and almost fuse it with the muzzle device itself. Is the reasoning because the very inner part of the crown which is just outside of the bore diameter is the most important part and is cleaned when running patches and an occassional brush? The crown is self cleaning due to the high pressure/velocity gasses excaping out of the barrel. Take a look at any gunked-up AR barrel, no matter how much carbon is caked on the muzzle you can still see the crown. |
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I think one thing to remember is that if the crown was properly cut to begin with the carbon buildup will be perpendicular to the bore and symmetrical to the extent it should have no ill effect on accuracy.
If you notice some strange deterioration in accuracy it may be an item to look at prior to considering anything more expensive. |
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