In stock
Spikes Tactical .223 Rem/5.56 Bolt Carrier Group, Nickel Boron - ST5BG03
In stock

Spikes Tactical .223 Rem/5.56 Bolt Carrier Group, Nickel Boron - ST5BG03

SKU 790050
Model Number ST5BG03
Brand Spikes Tactical
UPC 855319005501
Caliber .223 Remington, 5.56x45mm
Customers must read Compliance Information before purchasing.
This product is fulfilled by a PSA Partner and shipping times may vary.

Product Details


  • Size: 223 Remington/5.56x45mm NATO
  • Material: 8620 Steel Carrier, 158 Carpenter Steel Bolt
  • Finish: Nickel Boron
  • For Use With: AR-15 Style Rifle
  • Weight: 11.6 oz


Your bolt carrier group is one of the most critical parts of your build. Don't buy an imitation. This is the same BCG we use on our builds.


  • Complete nickel boron-plated M-16 BCG
  • Nickel boron coating inside and out (bolt, carrier, and gas key)
  • Laser engraved with ST Spider logo
  • Mil-Spec carrier - 8620 tool steel, full auto M-16
  • Bolt- 158 carpenter steel, shot peened, high pressure tested (HPT), magnetic particle inspected (MPI)
  • Mil-Spec extractor - 8620 tool steel, nickel boron finish, extractor spring, black extractor inser and Viton O-ring
  • Mil-Spec gas key - 8620 tool steel, grade 8 hardware, properly staked
  • Firing pin with hard chrome finish
  • Cam pin nickel boron finish
  • Retaining pin


Q & A


Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.