marklbucla
Member
I have a post ban Bushmaster M4 upper with a permanently attached mini-Y comp muzzle brake. The outside of the brake looks fine but I noticed that the muzzle brake has a lot of "jaggies" on the inside and well, to describe it as best as I can, it looks sorta like it's been burned.
Here's the best pic I could take of it. Is it normal or do I have a defective brake?
Here's the best pic I could take of it. Is it normal or do I have a defective brake?