Faxon Firearms FX8616 Sentinel 8.6 Blackout 16" Rifle - Black Nitride

The Faxon Firearms FX8616 Sentinel delivers precision-engineered performance in the versatile 8.6 Blackout chambering, combining subsonic capability with supersonic versatility in a 16-inch barrel configuration. This rifle addresses the growing demand for a platform that excels with both heavy subsonic projectiles and lighter supersonic loads. The black nitride finish provides superior corrosion resistance while maintaining the tight tolerances required for consistent accuracy.

What Makes This Different

The Sentinel platform incorporates Faxon's match-grade barrel technology with optimized rifling specifically designed for the 8.6 Blackout cartridge's unique ballistic requirements. Unlike standard AR-15 conversions, this rifle features a purpose-built bolt and barrel extension engineered to handle the increased bolt thrust of the 8.6 Blackout round. The 16-inch barrel length provides optimal velocity for both subsonic and supersonic loads while maintaining legal compliance without requiring NFA paperwork.

Key Features

• 8.6 Blackout chambering optimized for both subsonic and supersonic ammunition
• 16-inch match-grade barrel with black nitride finish for enhanced durability
• 20+1 round capacity with standard magazine compatibility
• Reinforced bolt and barrel extension designed for increased cartridge pressures
• Standard AR-15 trigger group and safety selector compatibility
• Picatinny rail system for optics and accessory mounting
• Adjustable gas system for reliable cycling with various load weights

The rifle demonstrates consistent accuracy across the full spectrum of 8.6 Blackout ammunition weights, from 160-grain supersonic loads delivering flat trajectories to 220-grain subsonic rounds ideal for suppressed applications. The adjustable gas system ensures reliable cycling whether running lightweight hunting loads or heavy match projectiles. The platform maintains compatibility with standard AR-15 triggers, safeties, and most accessories, allowing for extensive customization options.

Technical Specs

• Caliber: 8.6 Blackout (.338 caliber)
• Barrel Length: 16 inches
• Overall Length: Approximately 32.75 inches (with standard stock)
• Magazine Capacity: 20+1 rounds
• Barrel Finish: Black Nitride
• Twist Rate: 1:7 or 1:8 (optimized for heavy projectiles)
• Gas System: Adjustable, mid-length
• Rail System: Picatinny top rail, M-LOK compatible handguard
• Trigger: Mil-spec compatible
• Made in USA

The FX8616 Sentinel represents a significant advancement in multi-purpose rifle design, offering shooters a single platform capable of excelling in hunting, precision shooting, and tactical applications. The combination of proven AR-15 ergonomics with the ballistic advantages of 8.6 Blackout creates a rifle that bridges the gap between traditional hunting cartridges and modern tactical rounds.