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Old February 24, 2020, 02:03 AM   #3
Join Date: December 21, 2019
Posts: 34
Okay, don't take this the wrong way because I don't mean any insult, but I chuckled when I read that. The only parts I understood were Yes, some high end AR-15s had milled steel lowers. most were aluminum and some are polymer.

The particular grades of metal have little meaning to me. Sorry.

But thank you for the information.
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