Geissele Super Duty Mod Upper Assembly 16" Heavy Bbl 5.56 Black 08-617B

Geissele Super Duty Mod Upper Assembly 16" Heavy Bbl 5.56 Black is a duty-grade complete upper built for durability and precision. Anchored by a 16-inch Cold Hammer Forged heavy-profile barrel with a 1:7 twist and chrome lining, this upper is ideal for users demanding consistent accuracy and long-term resilience in high-volume shooting. The full-length barrel is paired with a mid-length gas system, promoting smoother recoil and enhanced reliability across varied conditions.

This upper comes equipped with the 13.5-inch MK16 Super Modular Rail (SMR), offering rock-solid M-LOK mounting across seven sides. A Geissele Reliability Enhanced Bolt Carrier Group and Airborne Charging Handle are included, rounding out a premium setup ready for demanding use. Whether you're building a precision-capable rifle or a rugged patrol carbine, this upper delivers top-tier performance in a clean black anodized finish.

• Caliber: 5.56 NATO
• Barrel Length: 16 inches
• Barrel Profile: Heavy
• Twist Rate: 1:7"
• Barrel Type: Cold Hammer Forged, Chrome Lined
• Gas System: Mid-Length
• Handguard: 13.5" MK16 Super Modular Rail (M-LOK)
• Finish: Black Anodized
• Includes Reliability Enhanced Bolt Carrier Group
• Includes Airborne Charging Handle