Moriarti AR-15 6.8 SPC BCG Hybrid Nitride, M16 Cut, .224 Valk, 22 Nosler, 400 Legend

6.8 SPC Hybrid BCG: Specs

he Moriarti AR-15 M16 Hybrid BCG with nitride finish is designed for shooters demanding maximum strength and reliable performance across multiple AR calibers. Compatible with 6.8 SPC, .224 Valkyrie, .22 Nosler, and .400 Legend, this full-auto M16-style bolt carrier group offers exceptional durability and smooth operation.

Constructed with an M16 full-auto style carrier coated in a hard nitride finish for superior wear resistance and corrosion protection, this BCG delivers long service life with reduced maintenance. The 9310 steel bolt is MPI tested for safety and reliability, ensuring your AR build performs under all conditions.

Key Features:

• Compatible Calibers:

  • 6.8 SPC

  • .224 Valkyrie

  • .22 Nosler

  • .400 Legend

• Carrier:

  • M16 full-auto style

  • 8620 steel construction

  • Durable nitride finish for corrosion resistance and low friction

• Bolt:

  • Made from 9310 steel

  • Phosphate-coated

  • MPI tested for structural integrity

• Gas Key:

  • Chrome-lined and properly staked

  • Secured with Grade 8 fasteners

• Includes:

  • Chrome-plated firing pin

  • Firing pin retaining pin

  • Cam pin

  • Fully assembled and drop-in ready

Application Notes:

Compatible with AR-15 upper receivers chambered in the listed calibers. Designed to fit mil-spec lowers and uppers. Functions reliably in both semi-automatic and full-auto capable setups (where legally permitted).

Upgrade your build with the Moriarti AR-15 400 Legend Upper Assembly

FAQ

Which calibers does it fit?

6.8 SPC, .224 Valkyrie, 22 Nosler and .400 Legend, as listed.

Related: AR-15 parts

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