Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO AR-15 Complete Upper Receiver - 14.5" - Black
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Overview
The Geissele Automatics Super Duty MOD 1 Heavy Barrel Complete Upper Receiver is designed for the AR-15 platform and features a 14.5-inch barrel chambered in 5.56 NATO, making it an excellent choice for builders looking for a compact yet powerful upper assembly. The complete assembly ensures a straightforward installation process, allowing you to focus on enhancing your rifle's performance. This upper is particularly popular among builds that prioritize the 5.56 NATO caliber, making it a versatile option for various applications.
Specifications
Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO AR-15 Complete Upper Receiver - 14.5" - Black
Build history on GunPartPicker
Builders on GunPartPicker first added the Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO AR-15 Complete Upper Receiver - 14.5" - Black to a build in January 2026.
It was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $1,325 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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