Last reviewed: 2026-04-17 by Jake Terry, FFL07/SOT3 holder, 20+ years behind the counter.
The Faxon 6.8 SPC BCG is an M16-profile bolt carrier group engineered for AR-15 builds chambered in 6.8 SPC or .224 Valkyrie. Faxon Firearms applies salt bath nitride to both the carrier and 9310 steel bolt, raising surface hardness and improving lubricity for smoother cycling and simplified cleaning. The bolt undergoes shot peening and magnetic particle inspection before leaving the shop floor, ensuring structural integrity under repeated high-pressure cycling. This assembly ships full-auto rated, with chamfered locking lugs to improve lockup timing and an S7 tool steel extractor to withstand the violent shock of pulling fired cases from the chamber.
Out of the Box
Faxon Firearms machines this BCG to mil-spec heat-treat standards, then finishes the carrier and bolt with salt bath nitride for corrosion resistance and reduced friction. The 9310 steel bolt provides higher tensile strength than Carpenter 158, and the 45-degree chamfer on each locking lug smooths engagement with the barrel extension. Grade 8 screws stake the gas key, and the S7 extractor maintains positive case extraction across varying chamber pressures. At 12.8 oz, the assembly falls within standard AR-15 BCG weight tolerances, making spring and buffer tuning straightforward.
The Numbers
| Spec | Value |
|---|---|
| Platform | AR-15 |
| Cartridge Compatibility | 6.8 SPC/.224 Valkyrie |
| Carrier Profile | M16 |
| Bolt Material | 9310 Steel |
| Bolt Finish | Salt Bath Nitride |
| Finish | Salt Bath Nitride |
| Weight | 12.8 oz |
| Magnetic Particle Inspected | Magnetic Partical Inspected |
| High Pressure Tested | Untested |
| MPN | FF224BCGCNITRIDE |
| UPC | 816341024724 |
This BCG fits standard AR-15 upper receivers and works with 6.8 SPC or .224 Valkyrie barrels that use the shared bolt face. The M16 carrier profile provides full-auto capability if you build on a registered lower, and the nitride finish ensures the assembly runs clean through extended strings. Find more AR-15 components and upgrades in our bolt carrier group section.
Safe Handling & Compliance
All firearms sold by Tatted Tacticals require transfer through a licensed Federal Firearms Licensee (FFL07) dealer. We ship to your designated FFL, where you complete ATF Form 4473 and a NICS background check before taking possession. Some states require additional state-level background checks, permits, or waiting periods — verify current requirements in your jurisdiction before ordering.
- Always follow the four rules of firearms safety when handling or installing this BCG.
- Check state and local laws before purchasing or installing any firearm component — some jurisdictions restrict full-auto-profile carriers.
- Headspace your completed upper before firing to ensure the bolt locks fully into battery with your barrel extension.
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