Stern Defense 9mm Pistol Upper AR15 6 Inch Melonite Barrel MLOK 1 in 10 Twist USA Made

The Stern Defense STERN DEF. PISTOL UPPER 9MM delivers a complete AR-15 SD MOD 5 9MM upper receiver assembly with M-LOK compatibility, engineered for reliable performance in a pistol-caliber platform. This 9mm Luger upper features a 6-inch steel barrel finished in Melonite for enhanced hardness and corrosion resistance, paired with a proven 1:10 twist to stabilize a wide range of 9mm ammunition. Made in the USA, this upper is designed to integrate seamlessly with standard AR-15 lowers, offering