New Armalite AR-10(T) carbine brass tool marks

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13 years 3 months ago #8494 by jsmithsd
New Armalite AR-10(T) carbine brass tool marks was created by jsmithsd
Fired the first four shots from my new Armalite AR-10(T) CBNF rifle.
Following the owner's manual for barrel break-in cleaning before and after every shot. Accuracy using Federal Premium Gold Medal Match Sierra 168 gr ammo is excellent.

Unfortunately :( I found some unusual circular marks on the fired brass casings that I don't like at all. The circular marks are raised in the brass with some serrations suggesting a groove left in the chamber from a tool.

See attached photos.

I contacted Armalite service and got a quick reply from Mario. I will be sending in the upper for inspection of the chamber. Looks like it may be tool marks left over from the manufacturing process. Bummer on a new $1600 rifle.

Anyone else see this kind of issue on their new rifle?

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13 years 3 months ago #8495 by MrMarty51
Replied by MrMarty51 on topic Re: New Armalite AR-10(T) carbine brass tool marks
Wow,that is some unusual markings and welcome to the forum.
I would first try and look into the chamber to see if there is any indication of what is happening and second would be to call armalite and tell them about the pwoblem.
Please reply back with Your findings,curious minds wants to know. :woohoo: :laugh:

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12 years 8 months ago #11169 by jsmithsd
Replied by jsmithsd on topic Re: New Armalite AR-10(T) carbine brass tool marks
It's been a while since I logged on to AR-10.com so I thought I would take a moment and follow up on the case marks issue i had with my new rifle.

I sent the upper back to Armalite and they replaced the barrel, test fired 3 shots, sent me the brass, and all is fine with the rifle.

The repair took 4 weeks from when I sent in the upper until I got it back. Armalite service was great, Mario sent me status E-mails during the work to let me know what they had found.

I mounted a Vortex Viper PST 2.5-10X scope and now have 400 rounds through the rifle. It shoots great with promised 1 MOA accuracy using 168 gr match ammo.

I really like this rifle and would recommend Armalite as a company that stands behind their products.

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