- Jun 15, 2015
I have an original 16" AR57 brand 5.7 upper in excellent condition. No bolt carrier group. $450 In DFW or can ship.
where does one get bcg?
That is the wrong bolt for this upper. CMMG is a different bolt/upper.I think Cmmg makes em.
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Showing my ignorance, what is different in the BCG for the AR57, compared to M16?