6mm ARC AR-15 Parts by AT3 Tactical
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AT3™
AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel Type II – Nickel Boron
Run Your 6.5 Grendel or 6mm ARC Upper Right with a NiB BCG It's important to have a bolt carrier group that has everything you need. MPI inspected bolt, properly... -
AT3™
AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel Type II – Black Nitride
Complete your hard-hitting 6.5 Grendel or 6mm ARC upper with a Black Nitride Bolt Carrier Group Our new 6.5 Grendel Bolt Carrier Group features a black salt bath nitride finish,...
AT3 Tactical provides high-quality, US-made components for precision rifles chambered in 6mm ARC. AT3 bolt carrier groups are compatible with 6.5 Grendel and 6mm ARC.
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