Spikes STU5435MLS 5.56 NATO 16 inch CHF Mid-Length Upper

The Spikes Tactical STU5435MLS is a complete upper assembly built for AR-platform rifles and delivered ready to mount as a drop-in upper. It is chambered for 5.56x45mm NATO and features a 16 inch cold hammer forged mid-length barrel finished in black phosphate. The assembly includes a 12 inch SAR3 free-floating handguard, a 7075-T6 aluminum receiver, an A2 front sight base, and an A2 flash hider.

Key Specifications

• Chambered for 5.56x45mm NATO (.223 Rem).
• The barrel measures 16 inches and is cold hammer forged with a mid-length profile.
• Barrel finish is Black Phosphate.
• Rate of twist is 1:7.
• Gas system is mid-length.
• Handguard is a 12-inch SAR3 free-floating design.
• Receiver material is 7075-T6 aluminum with a black finish.
• Includes an A2 front sight base.
• Includes an A2 flash hider.
• Product type is a complete upper assembly intended for AR rifles.

This complete upper is specified for shooters who want a durable, mil-spec compliant assembly for range work, precision shooting, or duty applications. Its cold hammer forged barrel, established twist rate, and free-floating handguard provide a solid foundation for dependable accuracy and serviceable performance in compatible AR builds.