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Spike's Tactical Low Mass Nickel Boron M16 BCG Bolt Carrier Group
Spike's Tactical Low Mass Nickel Boron M16 BCG Bolt Carrier Group

Spike's Tactical Low Mass Nickel Boron M16 BCG Bolt Carrier Group

Part Number:ST5BG05
On sale: $239.95
Retail Price:$250.00
You Save:$10.05(4%)
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Spike's Tactical Low Mass Nickel Boron M16 BCG Bolt Carrier Group

Product Description

Spike's Tactical, Bolt Carrier Group, M16, Lightweight, HPT/MPI Bolt, Nickel Boron Finish
Product Specifications

    UPC Code: 855319005518
    Manufacturer: Spike's Tactical
    Manufacturer Part #: ST5BG05
    Model: M16
    Model: Lightweight
    Type: Bolt Carrier Group
    Type: Part
    Finish/Color: Nickel Boron
    Description: HPT/MPI Bolt
    Subcategory: Bolts & Bolt Carrier Groups

Now you can get a proven Spike's Tactical M16 BCG Coated in Nickel Boron!

If you’re looking for the finest BCG on the market today, search no more! This is the same Mil-Spec BCG that we sell but the only difference is that it’s coated in Nickel Boron. And yes, it’s High Pressure Tested and Magnetic Particle Inspected (HPT/MPI)

Nickel Boron has proven itself to be the most durable finish on the market. It’s much smoother than Hard Chrome, it’s easier to clean, makes the rifle cycle smoother, it can be run almost lube free for thousands of rounds, and it will never chip, peal, or flake off! Because of these benefits, Nickel Boron is being adopted by the Military as well as many Government agencies. As you can see, these BCGs are a huge improvement over a standard Phosphate BCG and it’s even an improvement over Hard Chrome.

Upgrade to a better BCG today. You won’t be sorry!

NOTE: This BCG works in AR-15s. This BCG does NOT make your rifle fully-automatic.


  • Machined from 8620 Tool Steel (Carrier) and 158 Carpenter Steel (Bolt)
  • Shrouded firing pin.
  • Nickel Boron Coating inside and out (Bolt, Carrier, and Gas Key)
  • Forged Mil-Spec gas key attached with Grade 8 hardware and Properly staked.
  • Bolt is shot Peened and HPT/MPI
  • Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring
  • Tool Steel Extractor


  • Complete Nickel Boron Plated M-16 BCG
  • Spike's Tactical Lifetime Warranty


Written by Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE), Chief of the Firearms Technology Branch
...M16 bolt carriers are not designed and intended solely and exclusively for use in converting a weapon into a machinegun and are not any combination of parts from which a machinegun can be assembled.  Further, an M16 bolt carrier is not a firearm as defined in the GCA or a machinegun as defined in the NFA.  An M16 bolt carrier is simply a machinegun part and as such its domestic sale and possession is unregulated under the Federal firearms laws.  It is not unlawful to utilize a M16 machinegun bolt carrier in a semiautomatic AR15 type rifle.


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