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Valhalla Valkyrie Upgrade 5.56 AR15 Bolt Carrier Group AR-15 BCG
Valhalla Valkyrie Upgrade 5.56 AR15 Bolt Carrier Group AR-15 BCG

Valhalla Valkyrie Upgrade 5.56 AR15 Bolt Carrier Group AR-15 BCG

Part Number:VTS-BCG-S
Your Price: $159.95
In Stock.



Valhalla Valkyrie Upgrade 5.56 AR15 Semi-automatic Bolt Carrier Group AR-15 BCG

Whether you are looking for an Enhanced Bolt Carrier Group or a top quality spare, the Valhalla BCG is a great choice at an economical price. 


  • Upgraded Melonited Bolt
  • Assembled Bolt Carrier Group for AR-15
  • Hard Chrome Lined Semi-Auto Carrier with Milspec Phosphate Finish
  • Enhanced Full Shrouded Firing Pin
  • Chrome Lined, Staked Gas Key
  • Excellent Quality
  • Made in USA


The Valkyrie Bolt Upgrade is offered to meet and exceed all Mil Spec standards by including three of the most significant reliability upgrades you can buy.  This is upgraded to be used for direct impingement (aka gas tube) systems as a replacement/spare.   First, the Bolt is Ion Bonded for superior corrosion resistance and durability even when using inexpensive corrosive surplus ammunition. Second, a Milspec Viton O-ring is installed to assist in eliminating extraction problems in the M16, M4, and AR15.

Adams Arms Advantage:

Our bolts are finished with our proprietary QPQ Melonite process inside and out. Unlike hard chrome and magnesium phosphate, Melonite is a molecular bonding process with the metal. It allows the chemicals to seep down below the surface area of the metal, instead of just adding a top layer. This means that the bolt can offer complete corrosion resistance and virtually no wear. It also means that the protection offered is not just a thin layer on top of the material but actually penetrates layers deep ensuring that it does not wear off.


  • Heat Treated
  • Melonite Ion Bonded
Extractor Spring:
  • Chrome Silicone for Longer Life
  • Black Insert as per current Mil-Spec
  • Upgraded “O” Ring is high temp resistant

Extractor Retaining Pin:

  • Precision Machined
  • Heat Treated
  • Precision machined
  • Heat Treated

Ejector Spring:

  • Chrome Silicone
  • Precision ground ends

Ejector Retaining Pin:

  • Precision cut to length
  • Black Zinc Coating

Adams Arms Limited Lifetime Warranty


Upgrade to KNS Perma Pin

Upgrade to Nickel Boron Firing Pin 

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