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Questions & Answers
would this work on a ar15 5.56

Yes.... Says in the description that it's for . 223,5.56,300 blackout and 350 legend

by Dan, Verified Owner, December 6, 2025
Customer Reviews
Most Recent Reviews
What did I get ? by Vincent, Verified Owner, May 27, 2026
Product pictured has logo on it item I received did not no mpi markings on bolt so what exactly did i get could be bear creek arsenal Idk very disappointed to say the least
Most Recent Reviews
Auto bolt for auto mode or binary trigger by Robert, Verified Owner, January 23, 2025
This bolt is high quality. Installed it for use with the Hoffman super safety. Runs flausass in auto and semi
Read All 2 Reviews
Color:
Black
Finish:
Nitride
Caliber:
.300 AAC Blackout
Gun Model:
M16
Hand:
Right

Code: 5MY-BCG-MFUHJ2-MAR15-BCG-NTR

MPN: MAR15-BCG-NTR

UPC: 799787098866

List: $149.95Save 13%
$129.99

  • Moriarti M4/M16 Full Auto Comp Bolt Carrier Group, Nitride, Black, 7in, MAR15-BCG-NTR
  • Walker Defense Research Research Steel Bolt Carrier Group BCG, 5.56mm / .300 BLK, DLC, Flat Dark Earth, FDE-DLC-BCG-556
As low as $335.18
You Save Up to $34.76
OP Bucks$6.70

Product Info for Moriarti M4/M16 Full Auto Comp Bolt Carrier Group

The Moriarti M4/M16 Bolt Carrier Group (BCG) is a premium component designed for reliable performance and durability. Whether you're building a new rifle or upgrading an existing one, this BCG is engineered to handle the demanding conditions of military-grade use while enhancing overall rifle performance.image

This BCG features an M16-cut carrier, machined from 8620 tool steel for the carrier and 9310 steel for the bolt, ensuring strength and reliability. The black nitride finish provides an advanced, low-friction coating that reduces the need for excessive lubricants and cleaning, making it easier to maintain your firearm. Additionally, the carrier is equipped with forward assist serrations for smoother cycling during use.

Built to USGI specifications, the BCG is properly staked for secure gas key attachment, ensuring long-lasting performance. Every BCG is internally QC checked and tested to ensure it meets high standards of reliability and functionality under extreme conditions. Designed for 5.56/.223, 300 Blackout, and 350 Legend calibers, this BCG will perform exceptionally well in any compatible platform.

WARNING: California`s Proposition 65

Specifications for Moriarti M4/M16 Full Auto Comp Bolt Carrier Group:

Manufacturer: Moriarti
Color: Black
Finish: Nitride
Fabric/Material: 8620 Tool Steel
Caliber: .300 AAC Blackout
Gun Model: M16
Hand: Right

Features of Moriarti M4/M16 Full Auto Comp Bolt Carrier Group

  • Cerrated
  • Properly staked gas key
  • Machined & heat treated to USGI Specifications.
  • Internally QC checked and tested to ensure reliability.
  • M16-cut carrier

Package Contents:

  • Moriarti M4/M16 Full Auto Comp Bolt Carrier Group

Moriarti M4/M16 Full Auto Comp Bolt Carrier Group Orderable Models

List of Orderable Models

  • Moriarti M4/M16 Full Auto Comp Bolt Carrier Group, Nitride, Black, 7in, MAR15-BCG-NTR , MPN: MAR15-BCG-NTR , UPC: 799787098866 , Code: 5MY-BCG-MFUHJ2-MAR15-BCG-NTR
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Last updated 2026-07-04 UTC.