Spikes STU5025R9S M4 5.56x45mm NATO 16" Complete Upper - 9" BAR2 Quad Rail

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.