Spikes Tactical STU5025R9S | 5.56 NATO | 16in/9in

This Spikes Tactical STU5025R9S is a factory-built complete upper assembly intended for AR-pattern rifles. It pairs a 16-inch chrome-moly barrel finished in black phosphate with a 9-inch BAR2 free-float handguard and a 7075-T6 aluminum receiver. Components are built to Mil-spec standards and the upper ships ready to install on a compatible lower.

Product Specifications

• This listing is for a Complete upper assembly.
• Chambered for .223 REM/5.56 NATO.
• The barrel length is 16 inches.
• The barrel finish is Black Phosphate.
• The barrel is constructed from Chrome Moly.
• The rifling rate of twist is 1:7.
• The barrel profile is an M4 profile.
• The gas system uses a Carbine length configuration.
• The upper features an ST Micro gas block.
• The gas seat diameter is .750 inches.
• The handguard is a 9-inch BAR2 free-float handguard.
• The handguard finish is Black.
• The receiver is 7075-T6 Aluminum with a black finish.
• Includes a Spike’s Tactical Mil-Spec M16 bolt carrier group.
• The muzzle device is an A2 flash hider. UPC: 815648021085.

This upper is suitable for precision range work and duty-style AR configurations where Mil-spec components and consistent tolerances matter. Its 16-inch, 1:7 twist barrel supports a wide range of 5.56/.223 projectiles and the free-float BAR2 handguard provides a stable platform for optics and accessories. The assembly arrives inspected and ready for installation into a compatible lower.