Guys I have an interesting problem. I recently purchased a premium barrel from a well respected source that will remain unnamed. I know they would take the barrel back and replace it but being the do-it-yourselfer I am I want to fix it myself.
Now this is an AR-15 so please don't lose interest. It is still a barrel. First time I fired it it just locked up tight. Had to remove the lower and tap the bolt carrier to get it to unlock. I took it back home and checked it with the go/no go gages and everything was good. Checked the bolt and extractor and everything was good.
Looking at the brass I noticed two long scratches on the neck (see pic below). I suspicioned a bur in the neck. well that gave me an excuse to buy me a new toy. Got the new Lyman borescope. now my pics are not the best. It has a really clear view but every time I moved to hit the capture button I got them a little out of focus. I still think you can see what I believe is my problem. I think that ridge and the bur are from when they stopped the reamer when they were chambering it.
I ordered a couple of flexi hones that are about 10 thousands larger than what saami says the neck should be and plan to polish up just the neck. Got the 400 and 800 grit. Figured I would polish a little bit and take a look and repeat till its smooth. Flex-Hone®, Cross Hole Deburring, Ball Hones
Now this is an AR-15 so please don't lose interest. It is still a barrel. First time I fired it it just locked up tight. Had to remove the lower and tap the bolt carrier to get it to unlock. I took it back home and checked it with the go/no go gages and everything was good. Checked the bolt and extractor and everything was good.
Looking at the brass I noticed two long scratches on the neck (see pic below). I suspicioned a bur in the neck. well that gave me an excuse to buy me a new toy. Got the new Lyman borescope. now my pics are not the best. It has a really clear view but every time I moved to hit the capture button I got them a little out of focus. I still think you can see what I believe is my problem. I think that ridge and the bur are from when they stopped the reamer when they were chambering it.
I ordered a couple of flexi hones that are about 10 thousands larger than what saami says the neck should be and plan to polish up just the neck. Got the 400 and 800 grit. Figured I would polish a little bit and take a look and repeat till its smooth. Flex-Hone®, Cross Hole Deburring, Ball Hones
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