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Posted: 7/10/2012 4:55:38 AM EDT
This is my first AR build, and I used a complete Delton upper. I was surprised to see an oring around the extractor spring, i thought that was a mod I was going have to do later. I'm excited, something I didn't have to chase down. I pulled off a few rounds on my property after the build, but can't wait to take it to the range to see where it's really shooting.
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the O ring isn't needed and can provide too much Extractor tension. Brass smears on the bolt face is one result.
http://www.bravocompanyusa.com/BCM-Extractor-Spring-Uprade-Kit-p/bcm%20extractor%20spring%20%203pack.htm I run the Bravo spring and bumper in all my guns. Leave the O ring in the your parts box. |
The 308 BCG that I ordered from Rainier Arms (for my Mega MA-TEN build) came with the extractor upgrade. I didn't realize it until I went to install the parts  . I just assumed that it wouldn't have it. Oh well ... now I have an extra upgrade kit.
I take a close look at my brass to see if there are any marks just to be safe. |
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Quoted:
the O ring isn't needed and can provide too much Extractor tension. Brass smears on the bolt face is one result. http://www.bravocompanyusa.com/BCM-Extractor-Spring-Uprade-Kit-p/bcm%20extractor%20spring%20%203pack.htm I run the Bravo spring and bumper in all my guns. Leave the O ring in the your parts box. I hand load all my ammo and over 90% of it is with Remington commercial brass. I have had ZERO problems with my brass or rifle. It is something I will be watching more closely though. My owners manual says to make sure the "O" ring is installed. |
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