The Spikes Tactical STU5025M4S Complete Upper delivers a ready-to-fire 5.56x45mm NATO platform with a 16" chrome moly barrel finished in black phosphate and paired with a 7075-T6 aluminum black receiver, designed for M4 Carbine builds and upgrades. This complete upper features a reliable 1:7" twist rate that accommodates a wide range of 5.56 ammunition, while the M4 Double Head Shield handguard in black provides robust protection and a stable, ergonomic grip for extended shooting sessions. With an A2 front sight base incorporated, youll have a dependable aiming reference as you partner this upper with compatible components to create a streamlined, accurate rifle setup. The lightweight yet durable black receiver complements the barrel finish, ensuring a cohesive appearance and streamlined handling on the range or field. Spikes Tactical combines quality materials and precise machining to deliver a complete upper thats ready to mate with your existing lower, offering a solid foundation for tactical training, target practice, or hunting applications where reliability and performance matter.