Geissele Automatics167529658
Geissele Automatics Ar-15 Super Duty Mod1 5.56X45 11.5'' Bbl Complete Upper Ddc$1,450.00
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Availability: In Stock
Current Stock: Out of stock
The Geissele Automatics AR-15 Super Duty MOD1 5.56x45 complete upper with 14.5" barrel gives you a battle-ready upper receiver built on the reputation of USASOC-fielded components and precision American manufacturing. This is a complete upper that arrives ready to drop onto your lower receiver — barrel, bolt carrier group, charging handle, rail, and gas block all assembled and tuned. The 14.5" barrel comes pinned and welded with a HUXWRX Flash Hider-QD muzzle device, meeting legal requirements and keeping velocity in the 5.56 NATO sweet spot for duty and field use.
Geissele barrels are cold hammer forged and chrome lined with a 1-7 twist, built at their North Wales, PA facility to handle high-volume shooting without compromise. The carbine-length gas system and Super Compact Gas Block are engineered for reliability under extreme conditions — this isn't a budget upper, and it shows in every component choice. The SMR MK16 rail (a variant of the rail used by USASOC) features a center-aligning tab that locks out any possibility of rotation, and the extended upper provides a rock-solid platform for optics and accessories.
Where this upper truly separates itself is the Geissele Reliability Enhanced Bolt Carrier Group paired with the Geissele Stressproof Bolt. The BCG is Nanoweapon coated throughout, with a properly torqued and staked chrome-lined gas key and an H13 cam pin (medical-grade steel) that resists corrosion and wear. The Stressproof Bolt is forged from Carpenter 158+, not machined from bar stock — this grain-optimized construction delivers approximately 5 times the service life of a mil-spec bolt while handling extreme pressure and fatigue. Every bolt is high-pressure tested, magnetic particle inspected, and Nanoweapon coated before it ships.
Comes in black or DDC finish. This complete upper is purpose-built for shooters who demand precision, reliability, and longevity — whether you're on the range, running carbine courses, or gearing up for duty.
| Caliber | 5.56mm NATO |
| Barrel Length | 14.5" |
| Barrel Finish | Chrome lined, cold hammer forged |
| Twist Rate | 1-7 |
| Gas System | Carbine length |
| Gas Block | Geissele Super Compact |
| Bolt Carrier Group | Geissele Reliability Enhanced (Nanoweapon coated) |
| Bolt | Geissele Stressproof (Carpenter 158+) |
| Cam Pin | H13 medical steel, Nanoweapon coated |
| Rail | SMR MK16 |
| Charging Handle | Airborne |
| Muzzle Device | HUXWRX Flash Hider-QD (pinned and welded) |
| Color | Black or DDC |
| Type | Complete Upper Receiver |
This is a complete upper receiver — it includes the barrel, bolt carrier group, bolt, charging handle, rail, gas block, and muzzle device. You'll need to pair it with an AR-15 lower receiver to have a complete firearm.
The 14.5" barrel arrives with the HUXWRX Flash Hider-QD muzzle device pinned and welded permanently to comply with legal requirements for barrel length and overall firearm length in most jurisdictions.
The Stressproof Bolt is forged (not machined) from Carpenter 158+ steel developed in collaboration with Carpenter Steel metallurgists. The forging process optimizes the grain structure, resulting in a bolt that is cleaner, has fewer impurities, and delivers approximately 5 times the service life of a mil-spec bolt. Each bolt is high-pressure tested, magnetic particle inspected, and Nanoweapon coated.
The SMR MK16 is a variant of the rail fielded by USASOC and is known for performance and user comfort. It features a center-aligning tab that prevents any rotation when mounted to the upper receiver, ensuring a rock-solid platform for optics and accessories.
SKU: 167514343 • Width: 5in • Height: 3.25in • Depth: 30.75in • Weight: 4.94oz
Availability: In Stock
Current Stock: Out of stock
The Geissele Automatics AR-15 Super Duty MOD1 5.56x45 complete upper with 14.5" barrel gives you a battle-ready upper receiver built on the reputation of USASOC-fielded components and precision American manufacturing. This is a complete upper that arrives ready to drop onto your lower receiver — barrel, bolt carrier group, charging handle, rail, and gas block all assembled and tuned. The 14.5" barrel comes pinned and welded with a HUXWRX Flash Hider-QD muzzle device, meeting legal requirements and keeping velocity in the 5.56 NATO sweet spot for duty and field use.
Geissele barrels are cold hammer forged and chrome lined with a 1-7 twist, built at their North Wales, PA facility to handle high-volume shooting without compromise. The carbine-length gas system and Super Compact Gas Block are engineered for reliability under extreme conditions — this isn't a budget upper, and it shows in every component choice. The SMR MK16 rail (a variant of the rail used by USASOC) features a center-aligning tab that locks out any possibility of rotation, and the extended upper provides a rock-solid platform for optics and accessories.
Where this upper truly separates itself is the Geissele Reliability Enhanced Bolt Carrier Group paired with the Geissele Stressproof Bolt. The BCG is Nanoweapon coated throughout, with a properly torqued and staked chrome-lined gas key and an H13 cam pin (medical-grade steel) that resists corrosion and wear. The Stressproof Bolt is forged from Carpenter 158+, not machined from bar stock — this grain-optimized construction delivers approximately 5 times the service life of a mil-spec bolt while handling extreme pressure and fatigue. Every bolt is high-pressure tested, magnetic particle inspected, and Nanoweapon coated before it ships.
Comes in black or DDC finish. This complete upper is purpose-built for shooters who demand precision, reliability, and longevity — whether you're on the range, running carbine courses, or gearing up for duty.
| Caliber | 5.56mm NATO |
| Barrel Length | 14.5" |
| Barrel Finish | Chrome lined, cold hammer forged |
| Twist Rate | 1-7 |
| Gas System | Carbine length |
| Gas Block | Geissele Super Compact |
| Bolt Carrier Group | Geissele Reliability Enhanced (Nanoweapon coated) |
| Bolt | Geissele Stressproof (Carpenter 158+) |
| Cam Pin | H13 medical steel, Nanoweapon coated |
| Rail | SMR MK16 |
| Charging Handle | Airborne |
| Muzzle Device | HUXWRX Flash Hider-QD (pinned and welded) |
| Color | Black or DDC |
| Type | Complete Upper Receiver |
This is a complete upper receiver — it includes the barrel, bolt carrier group, bolt, charging handle, rail, gas block, and muzzle device. You'll need to pair it with an AR-15 lower receiver to have a complete firearm.
The 14.5" barrel arrives with the HUXWRX Flash Hider-QD muzzle device pinned and welded permanently to comply with legal requirements for barrel length and overall firearm length in most jurisdictions.
The Stressproof Bolt is forged (not machined) from Carpenter 158+ steel developed in collaboration with Carpenter Steel metallurgists. The forging process optimizes the grain structure, resulting in a bolt that is cleaner, has fewer impurities, and delivers approximately 5 times the service life of a mil-spec bolt. Each bolt is high-pressure tested, magnetic particle inspected, and Nanoweapon coated.
The SMR MK16 is a variant of the rail fielded by USASOC and is known for performance and user comfort. It features a center-aligning tab that prevents any rotation when mounted to the upper receiver, ensuring a rock-solid platform for optics and accessories.
SKU: 167514343 • Width: 5in • Height: 3.25in • Depth: 30.75in • Weight: 4.94oz