Geissele Super Duty 5.56 NATO Complete Upper – OD Green, Mk16 Handguard, Nanoweapon BCG
The Super Duty Complete Upper Receiver Group combines Geissele’s combat-proven components into a ready-to-run package. An OD Green hardcoat anodized 7075-T6 receiver and matching Mk16 free-float handguard surround a cold-hammer-forged, chrome-lined barrel and Nanoweapon-coated bolt carrier group, giving the shooter a durable, duty-grade upper that is suppressor-ready out of the box.
Condition
Overall Condition: Very Good
Bore Condition: Bright & Clean
Specific Condition Notes: Minimal markings from previous handling and use.
What’s Included
- Magpul MBUS Pro steel flip-up front sight
- Magpul MBUS Pro steel flip-up rear sight
The cold-hammer-forged, chrome-lined barrel is built for long service life and consistent accuracy. Its 1/2-28 threaded muzzle ships with a suppressor-ready flash hider, giving buyers an easy path to muzzle device or suppressor installation.
A 13.5-inch Geissele Super Modular Rail Mk16 handguard (built from 7075-T6 aluminum) delivers rock-solid accessory mounting with a continuous, T-marked Picatinny top rail and steel helicoil-reinforced QD sling sockets. The Mk16 design traces its lineage to the USSOCOM URG-I program, ensuring real-world reliability.
The Nanoweapon-coated bolt carrier group offers extreme wear and corrosion resistance, while the Airborne Charging Handle provides reduced-profile, ambidextrous levers that stay out of the way of optics and sling hardware.
Both the upper receiver and handguard feature matching OD Green hardcoat anodizing for a uniform, non-reflective finish. The assembly deletes the traditional forward assist plunger, saving weight and streamlining the receiver’s exterior.