I just removed my A2 flash hider on my AR15. I am going to replace it with a muzzle brake. When I removed the flash hider, I noticed caked on green material on the crown of the muzzle.
1. Is this copper?
2. Is it best to remove it before I put my brake on?
3. If so, what is the best way to remove it?
Thanks.
1. Is this copper?
2. Is it best to remove it before I put my brake on?
3. If so, what is the best way to remove it?
Thanks.