The Faxon Firearms FX8612 Sentinel AR Pistol is engineered for robust performance in a compact footprint. Chambered in 8.6 Blackout, this platform leverages a 12-inch black nitride barrel to maximize the cartridge’s effectiveness, delivering significant terminal ballistics suitable for specialized applications requiring a short-barreled rifle equivalent. Designed for demanding users, the Sentinel integrates Faxon’s manufacturing precision with a focus on reliable function.
Key Features
8.6 Blackout Caliber Optimization
The FX8612 Sentinel is purpose-built around the 8.6 Blackout cartridge, optimizing its performance from a short 12-inch barrel. This caliber provides substantial energy delivery and effective suppression capability when paired with appropriate muzzle devices. The system is tuned to ensure consistent cycling with varying projectile weights inherent to the 8.6 Blackout ecosystem.
Precision Engineering and Materials
Faxon’s commitment to precision manufacturing is evident in the Sentinel. The 12-inch barrel features a durable Black Nitride finish, enhancing corrosion resistance and surface hardness for extended service life and consistent bore dimensions. The AR pistol platform utilizes robust 7075-T6 forged aluminum for both upper and lower receivers, providing a rigid foundation for sustained operational integrity. All critical components are machined to stringent tolerances, ensuring reliable interfacing and consistent performance.
Compact Form Factor for Deployment
With a 12-inch barrel, the FX8612 Sentinel is designed for maneuverability and ease of transport. Its AR pistol configuration facilitates discreet carry and rapid deployment in confined environments, making it a viable option for specialized law enforcement applications or for users prioritizing compact firepower. The design balances ballistic efficiency with a reduced overall length.
Reliability and Durability
The gas system is calibrated to ensure reliable extraction and cycling across a broad range of 8.6 Blackout ammunition types. Critical components are selected for their durability and resistance to operational stresses, mitigating wear and tear under demanding use. This focus on reliability ensures the platform maintains operational readiness when it matters most.
Technical Specifications
- Brand: Faxon Firearms
- Model: FX8612 Sentinel
- Caliber: 8.6 Blackout
- Capacity: 20+1 Rounds
- Barrel Length: 12 inches
- Barrel Finish: Black Nitride
- Platform: AR Pistol
- Receiver Material: 7075-T6 Forged Aluminum (Upper & Lower)
- Action: Semi-Automatic, Direct Impingement









