The AB Arms PRO Advanced Rifle Bolt Carrier Group is specially made to have exacting tolerances and surface finishes and built to Mil-Spec dimensions. These Bolt Carrier Groups by American Built Arms Company are built of 8620 steel and coated in Nickel Boron with a Nickel Boron coated bore, so you'll need nearly no lubrication.
The AB Arms PRO Advanced Rifle Bolt Carrier Group is specially made to have exacting tolerances and surface finishes and built to Mil-Spec dimensions. These Bolt Carrier Groups by American Built Arms Company are built of 8620 steel and coated in Nickel Boron with a Nickel Boron coated bore, so you'll need nearly no lubrication.
$11.82