Spike's Tactical 5.56 NATO M16 Cut Nickel Boron Bolt Carrier Group

Manufactured by Spike's Tactical
Manufactured by Spike's Tactical
59 Reviews

In Stock

Standard orders will ship out same day if ordered by 3:30pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



Your bolt carrier group is one of the most critical parts of your build. Don't buy an imitation. Spike's Tactical AR-15/M16 Nickel Boron Bolt Carrier Group. These complete bolt carrier groups come magnetic particle inspected and high pressure tested. The carrier is made from 8620 steel and the bolt from 9310 tool steel. The gas key is properly staked, the extractor spring has been upgraded with an O-ring for increased tension, and all surfaces are coated with nickel boron. Nickel boron is much easier to clean and can help your firearm run more reliably when heavily fouled or with little lubrication. The Spike’s Tactical Spider Logo is engraved on the right side of the carrier to show through the ejection port. Assembled BCG weighs 11.6 oz.


  • Firing pin with hard chrome finish.
  • Cam pin with nickel boron finish.
  • Retaining pin.

Bolt carrier:
  • 8620 tool steel.
  • Full Auto/M16 cut.

  • 9310 tool steel.
  • Shot peened.
  • High pressure tested.
  • Magnetic particle inspected.

  • 8620 tool steel.
  • Nickel boron finish.
  • Extractor spring.
  • Black extractor insert.
  • Viton O-Ring.

Gas key:
  • 8620 tool steel.
  • Grade 8 hardware.
  • Properly staked.
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Bolt FinishNickel Boron
Bolt Material9310 Steel
BrandSpike's Tactical
Caliber Gauge5.56 NATO
Carrier FinishNickel Boron
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected
Manufacturer.Spike's Tactical
Weight11.6 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Spikes Tactical BCG W/ Nickel Boron Coating


After years in the US Army (now retired) and having had BCG's in M16 that always seemed to get so horrible dirty after shooting on ranges. I wanted to make life easier for me with my Ar15 at home. The BCG coated with Nickel Boron is like nothing I've ever dealt with before. It is truely awesome and can be cleaned almost just by wipeing with a clean rag. A must have for anyone who's concerned with making easy in the cleanup after firing!



Always a pleasure going to primary arms.nice quality bolt carrier group for your money.

Looked good...


BCG looks good, slightly different than the last Spikes NibX I got, different machining/look... But still a quality piece. The first I got was missing a gas ring and the remaining rings were damaged, but PA took care of me... This BCG came complete, but has more of a rough overall appearance. Happy with it though.

Best price Best NIB BCG


Been shopping for NIB BCG Spikes Tactical BCGPrimary Arms offer the best price I have seen online.

Spikes Tactical BCG NiB


Breakdown and inspections reveals a great looking bolt, tight bolt to BCG fit, properly staked ext... Haven't had a chance to shoot it yet.Always a pleasure to deal with PA

Exactly what I expected and quick shipping.


Everything was exactly as expected and the shipping time was great.

Spikes Tactical Bolt Carrier Group with Nickel Bor


Excellence company to deal with! super fast shipping.

Great product!


Excellent product from spikes. The nickel boron finish is the best out there. Definately will be buying more from primary arms.

Spikes Tactical Bolt Carrier w Nickel Boron


Excellent service as usual, fast delivery!



Finished my build and put it in and it was great, until I function checked. When I let the hammer fall it jammed, would not extract and the bolt would not rotate even with heavy lube. Took disasembly and force, tried it in factory Colt, DD, and Stag. Same prob. My BCM bcg works fine in my build, but wanted NiB. The part I got seemed to be machined to the wrong specs (I know that FailZero coats some of these products, and I read a post by their head gunsmith that stated that if the bcg does not fit you need to have your headspace checked that it is not match grade and is instead mil spec as these bcg's are patterned after Colt style rifles... But it would not work in my colt?). Returned to PA for refund. They are out of stock. How does that even leave Spikes Tactical not functioning? I have to add that PA is still the great. They handled it well, gave me return shipping labels and a full refund. I will try another when in stock.