Gus's Garands is your best bet but he usually has a 6 month lead time. If you are mechanically inclined, I encourage you to buy the tools and do it yourself, it isn't too terribly complicated. I'd he happy to walk you through the process if you choose to DIY
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Much like anonymous sex, internet based gun transactions are mildly risky, but almost always worth it.
I'm not a surgeon, why? What's a little sepsis between friends?
Everyone takes a beating sometimes