Egging spot on a M&P15-22 barrel

[germargo]

On one of my M&P15-22 rifles visible egging spot on about 2/3 from the end of the barrel and 1/3 to the end of the handguard.
Is it a common thing from manufacturing, or may it cause the barrel faulty?

 

[germargo]

BTW: I just checked another rifle in my possession. On one of them, I found a closest but barely visible to the pictured egging spot in about the same location - about 2/3 from the end of the barrel and 1/3 to the end of the handguard.

 

[ralph7]

I'd take a hard look with a bore light. If nothing internal, I wouldn't sweat it.
May be just an external flaw, hard to tell from your pics.

 

[huntsman22]

I prefer 'bacon' spots to go with my eggs
......

 

[Kp321]

The first rifle barrel looks suspiciously like it has a ring from firing with some type of bore obstruction. A borescope will tell the story. Even if it is ringed, no worries. Not dangerous and most ringed barrels still shoot well.

 

[Pubtym]

Spot

On one of my M&P15-22 rifles visible egging spot on about 2/3 from the end of the barrel and 1/3 to the end of the hand guard.
Is it a common thing from manufacturing, or may it cause the barrel faulty?

I checked mine. I have a similar spot-ring. I don't think it's a biggie. Probably just from a barrel holding grip tool during manufacturing and assembly.