AR-15 BCGs, Bolts, & Firing Pins?

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kcofohio

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Hopefully I lay out my questions plain enough.

Right now I have 223/556 & 300 Blk uppers. But I'm wanting to get the parts to build a 6.5 Grendel upper.

If I understand correctly, the difference between 223/556 and 6.5 Grendel BCGs is the bolt? The carrier is the same, correct? Is the firing pin the same between them?

Also, is there a recommended supplier of spare bolt, carrier, parts, and pins?

TIA, kc
 
Even if the carrier and firing pin are the same I would opt for a complete differenct BCG for the 6.5 for sheer convenience.
I'm planning on getting a different treated carrier so the color will stand out from the rest. But I intend on having extra bolts, extractors, pin, etc. on hand.
 
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