The STERN DEFENSE Upper with a 16.1" barrel and 15" M-LOK rail offers a high-performance solution for your AR-15 platform. This complete upper features a 16.1" 9mm barrel with a 1:10 twist rate, optimized for accuracy and reliability. The free-float 15" M-LOK handguard provides ample space for accessories while maintaining a sleek profile. The upper includes a Glock-compatible bolt carrier group and an enhanced charging handle for smooth operation. Machined from high-quality materials and finished with a durable coating, this upper ensures consistent performance in various shooting conditions. The enlarged ejection port accommodates 9mm rounds, making it an ideal choice for pistol caliber carbine builds.

Features and Specifications:

• Caliber: 9mm
• Barrel: 16.1" 4150 Chrome-moly steel, 1:10 twist rate, Melonite coating
• Gas System: Blowback operated
• Upper Receiver: 7075-T6 aluminum, hard-coat anodized
• Handguard: 15" free-float M-LOK compatible, 6061 aircraft grade aluminum
• Bolt Carrier Group: Glock-compatible, 8620 AISI steel with Mag-Phosphate finish
• Charging Handle: Enhanced SD CH1 design for easy manipulation
• Muzzle Device: SD CB9 Compensator Break (1/2-36 thread)
• Includes assembled upper receiver with dust cover and forward assist
• Weight: Approximately 15.5 oz (bolt carrier group)
• Made in the USA