Faxon Firearms FX5216X Sentry 5.56 NATO 16" Rifle M-LOK

The Faxon Firearms FX5216X Sentry delivers precision engineering in a complete AR-15 platform chambered in 223 Rem/5.56 NATO. This rifle combines Faxon's renowned barrel manufacturing expertise with premium components to create a versatile firearm suitable for multiple shooting disciplines. Built around a 16-inch nitride-treated barrel and featuring a 15-inch M-LOK handguard, this configuration provides the optimal balance of accuracy and maneuverability.

What Makes This Different

Faxon Firearms builds this rifle with their signature attention to barrel quality, utilizing a black nitride finish that provides superior corrosion resistance compared to standard phosphate coatings. The 15-inch M-LOK handguard extends nearly to the muzzle, offering extensive mounting real estate while maintaining a lightweight profile. The B5 Systems stock and grip combination provides enhanced ergonomics over mil-spec components, with improved cheek weld and texture for positive control.

Key Features

• 16-inch barrel with black nitride finish for enhanced durability and accuracy
• 15-inch M-LOK handguard with multiple mounting positions for accessories
• B5 Systems Bravo stock with improved length of pull adjustment
• B5 Systems Type 23 grip with enhanced texture and ergonomics
• 223 Rem/5.56 NATO chamber accepts both cartridge types
• Mid-length gas system for reliable cycling and reduced recoil
• Standard AR-15 magazine compatibility

The 16-inch barrel length provides excellent velocity retention while remaining compact enough for tactical applications. The nitride treatment penetrates the steel surface, creating a finish harder than chrome lining while maintaining dimensional accuracy. This rifle excels in competitive shooting scenarios where precision matters, while the robust construction handles demanding training schedules. The M-LOK attachment system accommodates bipods, lights, and other accessories without adding unnecessary weight.

Technical Specs

• Caliber: 223 Remington/5.56 NATO
• Barrel Length: 16 inches
• Barrel Finish: Black nitride
• Handguard: 15-inch M-LOK free-float
• Stock: B5 Systems Bravo adjustable
• Grip: B5 Systems Type 23 pistol grip
• Gas System: Mid-length
• Overall Length: Approximately 32.5-35.5 inches (stock dependent)
• Weight: Approximately 6.5-7.0 pounds
• Magazine Capacity: Accepts standard AR-15 magazines

Faxon Firearms' reputation for precision manufacturing ensures consistent performance across multiple platforms. The combination of proven components and quality assembly creates a rifle that performs reliably in various conditions. This complete rifle eliminates the guesswork of component compatibility while delivering the accuracy Faxon barrels are known for.