Harris Tactical has some their NiB-X (nickle boron) coated AR-15 bolt carrier groups (BCG) in stock and ready to ship! Harris Tactical tells me that FireClean works very well with these bolts because of how it adheres to the NiB-X so they are offering a bottle of it as an add-on at the point of sale.
Check out the NiB-X BCGs at Harris Tactical.
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