Gunsmithing Normal AR bolt wear?

[freereload]

I recently built my first AR, and after a quick 40 rounds to break the barrel in, I took a look at my bolt and was wondering if this wear is normal?

It's got 40 rounds through it and 2-300 hand-cyclings. I just wiped it off a little after shooting it.
Thoughts? Any input is much appreciated.
All the wear on the back of the lugs is smooth, there was just a couple flecks of brass that got smeared on the back of a lug or two.

 

[josh1982]

Looks just fine, the phosphate surfaces are slicking up due to the rotation of the locking lugs of the bolt into the barrel extension when the rounds are chambered. Clean it really well when you are done and keep going.

 

[freereload]

Okay. You see that the phosphate is nearly worn through, right? That's not just reflection you're seeing. It's my first AR and I never payed attention to this stuff on other people's rifles.

 

[josh1982]

Did you check headspace with a go/no go gauge?

 

[freereload]

I had the local gun shop check it. Said it was good to go.
Why do you ask?

 

[CASDB]

Mine look the same. You've got metal rubbing against metal, any finish is going to wear quickly. Multiple locations on your bolt and bolt carrier will eventually look the same.

 

[BigBlue&Goldie]

What brand is the BCG? There was a bunch of BCG's that went out during the panic that were made of soft material that showed signs of premature wear or sheared lugs.

 

[freereload]

It's a Head Down AR-15 BCG. They say the bolt is carpenter 158, and batch HPT/MPI. Not the AR Stoner ones that everybody was having problems with. Mine seem to be machined differently than the Stoners. I originally had a Stoner BCG, but took it back after it wore through the finish on the bolt in that region that is raised to act as a bearing surface. Just from checking it out when I got home, mind you. Never even touched my rifle. All my wear is smooth and I can't see any peening or shearing happening of any sort, I'm just not sure how much wear to expect when breaking in a new AR.

 

[WhiteHorze]

With the AR your barrel is screwed into a barrel extention that has the lug recesses cut into it. What your seeing is a barrel that was screwed into the extention a bit to deeply and the front face of your lugs are rubbing on the back of the barrel. So long as the rifle functions and feeds correctly, and your not galling the front of the lugs, this isn't going to be a problem. If your moving metal around inside the locking lug area of the barrel extention, then you need to have that fixed by someone who knows what they're doing.