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These .308 (DPMS Pattern) Bolt Carrier Groups feature NiB-X Nickel Boron Baked Coating, which provides extreme durability, performance, and reliability. The Nickel Boron coating is corrosion resistant and harder than Nickel Teflon, Melonite, or Hard Chrome with a hardness of RC 72. Cycling is smoother and debris and buildup can simply be wiped free.

Components included in the Assembly are mil-spec and manufactured by US suppliers. The Bolt assembly is case hardened, shot peened, magnetic particle inspected, and constructed of Carpenter 158 steel. The extractor includes a high performance spring and black buffer. The 308 style Carrier is machined from 8620 steel, heat treated, and case hardened. Attachment of the Gas Key is done with grade 8 hardened fasteners, which are staked per mil-specs. The Gas Key is sealed with the proper gasket as well.

SPECS: Fits .308 DPMS Patterned upper receivers.

Nickel Boron baked on coating

Bolt – carpenter 158 steel, case hardened, shot peened, magnetic particle inspected.

Extractor – NiB HD Springs 

Carrier – 8620 steel, heat treated, and case hardened.

Gas Key – properly staked grade 8 heat treated fasteners.

Full-Auto Cut (Non-NFA Item)

If you cancel before invoicing/charge, no problem. If you cancel after invoicing, you will receive the refund minus 6% for CC processing and refund fees. There was plenty of time to cancel before it was invoiced.

No Returns taken on Bolt Carrier Groups. If defective, we will arrange shipment and return to Manufacturer Representative for Inspection/repair or replacement. Void if fired with Reloads or if Rifle is not assembled by a Manufacturer or Gunsmith. We stand behind our Products. Any issues, please email returns@harristacticalonline.com

Now you have an option to add the only lubricant/cleaner that sticks to Nickel Boron, which is FIRE Clean. This product is revolutionary on all moving metal surfaces, Direct impingement, suppressed and belt fed weapons. Works well on all surfaces and non-toxic. If you would like more than one bottle, type in "Fireclean" in the white search box to add more. You can also read more about it. Once you do and use it, you'll never use anything else on your weapons. 

Arriving 6/14, shipping 6/15. Closed from 6/17-6/30 and will resume shipping after 7/1.