PDA

View Full Version : Patina? on the inside of flashhider/crown


andy t
12-29-10, 22:18
I noticed a what appears to be patina/discoloration on the inside of a flash hider of a few BCM uppers. It also appears right above my crown. Is this an issue for concern - will it affect accuracy?
Here is a photo:
http://lh5.ggpht.com/_RqhmxgatMG0/TRawGopEImI/AAAAAAAADNg/iJ5nKTttx3g/s800/CIMG1840.JPG
orlanger
12-29-10, 22:37
It's simply oxidized fouling. If it bothers you, solvent should remove it.

Some lubricants/degreasers/solvents can contain sulfur which can react with copper fouling and give a blue-green appearance as well.
5pins
12-30-10, 00:03
It’s just a reaction of the copper and the cleaning solvents nothing to worry about. Get a brush and clean it out.
tuck
12-30-10, 00:14
Your rifle is junk, and is unsafe to shoot. Feel free to send it to me for proper disposal. I'll even cover the shipping... :sarcastic:
arizonaranchman
12-30-10, 01:52
It's probably from your solvent and cleaning process. Not a concern. Scrub it out with a brush if it bothers you.
T-TAC
12-31-10, 07:29
You should see the Flash hiders that the Suppressors screw on to.
The last one I looked at actually had a Light blue coloring to it on the out side.
GermanSynergy
12-31-10, 18:43
No worries- keep shooting it.:D