Description
The Spikes STU5025R9S Complete Upper is a New complete replacement upper for an M4 carbine, chambered in 5.56x45mm NATO. It pairs a 16″ chrome moly barrel with a 9″ BAR2 free-float quad rail handguard.
The barrel features a black phosphate finish and a 1:7 twist rate. Its 7075-T6 aluminum receiver has a black finish, and the handguard is also finished in black.
This complete upper is supplied with no sights and is optic ready.
