Okay, I stopped by and called a few gunsmiths, and no one will swap the gas block on my upper because they don't have an AW permit.
Once again I'm convinced nobody knows the law. One gunsmith even told me he was about to send his Bushmaster upper back to Bushmaster to do the same swap I wanted.
Anyway, can someone recommend a shop in the East or South Bay that knows what they're doing? Or, if someone can post up a how-to, I could try to attempt it myself.


Anyway, can someone recommend a shop in the East or South Bay that knows what they're doing? Or, if someone can post up a how-to, I could try to attempt it myself.
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