AR15.Com Archives
 Best Way To Polish Chamber?
vARiableone  [Member]
10/31/2009 7:13:39 AM
Can anyone provide me with info on the best way to polish the chamber on my DPMS 308???
Thanks.
GHPorter  [Team Member]
10/31/2009 9:36:34 AM
The reason you need to polish the chamber is important in deciding "the best way" to do it. Is it scratched? Is it just "not perfect?"
MikeinGA  [Member]
10/31/2009 7:14:34 PM
I polish all my chambers, it makes it easier to keep them clean. I use a chamber mop on an old cleaning rod I cut down with a lot of Flitz polish and a variable speed drill at it's slowest setting. If the chamber has any marks after polishing show it to a gunsmith. That's IMHO.

Mike
lesm  [Member]
11/1/2009 1:20:52 AM
Same as above, I use a shotgun bore mop with Flitz.
AR-Performance  [Dealer]
11/1/2009 1:28:40 AM
Iosso is a little quicker, the mop needs to fit pretty tight in the chamber, be sure not to let it go in to the neck or throat and damage the lands.
Production barrels are just cut with a reamer but, if a smith does a custom chamber right it should be finished with 600 grit for an AR.
Cavitation  [Member]
11/1/2009 1:06:16 PM
Arm and Hammer toothpaste with a drill chucked mop works well for me.

AL
CAC01  [Team Member]
11/1/2009 8:09:52 PM
Is the chamber chrome lined? I'm guessing you won't be able to polish it if it is.

If it is not chrome lined, polish it to much and the law of unintended consequences is going to rear its ugly little head...
vARiableone  [Member]
11/2/2009 6:50:33 AM
Originally Posted By CAC01:
Is the chamber chrome lined? I'm guessing you won't be able to polish it if it is.

If it is not chrome lined, polish it to much and the law of unintended consequences is going to rear its ugly little head...


No, not CL.
Just like the idea of a little polish job to make cleaning easier. There is alot going on in a big cal. like 308 when you pull the trigger.
heat762  [Member]
11/2/2009 11:14:23 AM
I don't know about BEST. But this is what worked in my old DPMS .308.

Get a .410 Mop. Use some Dremel polish compound. Use variable speed drill. Insert into chamber and polish for about 30 second about medium speed. Clean it all out and repeat. I did this and my chamber was nice and shiny. Rounds came flying out of there like a scalded ape. Made cleaning easier too. YMMV
vARiableone  [Member]
11/2/2009 3:26:34 PM
Originally Posted By heat762:
I don't know about BEST. But this is what worked in my old DPMS .308.

Get a .410 Mop. Use some Dremel polish compound. Use variable speed drill. Insert into chamber and polish for about 30 second about medium speed. Clean it all out and repeat. I did this and my chamber was nice and shiny. Rounds came flying out of there like a scalded ape. Made cleaning easier too. YMMV


Now that's the info I was hoping for.
Thank you very much!!!
Billetman  [Member]
11/2/2009 8:06:46 PM
I'm surprised someone doesn't make a chamber polishing pc of formed ultra-fine scotch-brite type stuff in the shape of the chamber to make this easier?
I normally use ultra fine scotch-brite or some sort of paste.


B-Man
Shark06  [Member]
11/2/2009 9:35:20 PM
Just saw this... Maybe make it a sticky for us 308 noobs??!
CAC01  [Team Member]
11/2/2009 10:15:07 PM
Polish it to much and your rifle won't extract properly. I wouldn't reccomend anything finer than 600 grit. A little cross hatching on the chamber wall is a good thing.