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Old August 15, 2018, 09:22 AM   #20
stagpanther
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Join Date: March 2, 2014
Posts: 11,784
Quote:
The tail (or end) of the extractor is flared out to reduce the potential for breakage. These bolts are similar to JP or ARP 6.8 bolts that are beefed up. Here's photos of the the extractor....

https://lwrci.com/p-90-lwrci-advance...-68-spcii.aspx

https://lwrci.com/p-204-lwrci-acb-extractor.aspx
Interesting.

Having personally blown up an AR with a 300,000+ psi load--my observation has been the extractor and it's slot in the bolt are a primary conduit for vaporized metal and high-pressure gasses out the bottom of the carrier (which can also fail and blow off) and down the mag well--blowing up your magazine in the process--but otherwise keeping the upper receiver and the shooter intact.
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