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Can You Put An Ar9 Upper On Ar-15? [Solved]
Yes. AR9 isn’t even a real term, it’s just easier to say AR9 than to say AR15 chambered in 9mm. So as long as you have a mag well insert and the correct buffer and buffer spring, you’re good.23 Feb 2020
Quick Tip: Converting a 5.56 AR-15 to 9mm
Converting a 5.56/.223-chambered
Any 5.56 AR-15 Can Now Take Glock Mags?!
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Shoot 9mm with your mil-spec AR Lower! CMMG 9 AR Conversion Magazines
The 9
