Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver - 10.3" - DDC
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Geissele
Overview
The Geissele Automatics Super Duty MOD1 complete upper receiver is designed for the AR-15 platform, featuring a 10.3-inch barrel chambered in 5.56 NATO with a 1:7 twist rate, which enhances stabilization for a wide range of bullet weights. This upper receiver comes fully assembled, allowing builders to quickly install it and get to shooting with confidence. It's commonly found in short-barreled rifle builds that prioritize maneuverability and close-quarters performance.
Specifications
Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver - 10.3" - DDC
Build history on GunPartPicker
Builders on GunPartPicker first added the Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver - 10.3" - DDC to a build in April 2026.
It was hard to find in August 2026, in stock on only 4 of the 23 days we checked, and today only Primary Arms has it in stock. It dipped to $1,170.04 at Brownells for a stretch in August 2026, well under its usual $1,438.99 to $1,450, so sales do come around. Buying today, the lowest price is $1,450 at Primary Arms, above August's low of $1,170.04, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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