Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO Complete Upper Receiver - 16" - DDC
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Overview
The Geissele Automatics Super Duty MOD 1 Heavy Barrel Complete Upper Receiver is designed for builders looking for a robust and reliable option for their AR-15 platform. With a 16" barrel chambered in 5.56 NATO, this upper receiver delivers consistent performance and accuracy, making it suitable for a variety of shooting applications. This upper is commonly found in builds that prioritize the 5.56 NATO caliber, allowing for versatility and effective use in different scenarios.
Specifications
Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO Complete Upper Receiver - 16" - DDC
Build history on GunPartPicker
Builders have been adding the Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO Complete Upper Receiver - 16" - DDC to their builds on GunPartPicker since January 2026. All time, it ranks #489 of the 1,714 upper receivers builders have added.
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 $1,238 at Primary Arms for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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