Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver - 12.5" - DDC - 08-545S

Elevate your AR-15 build with the Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver in 12.5″ – DDC, a pinnacle of precision engineering designed for tactical enthusiasts and competitive shooters who demand unwavering reliability and performance. Crafted by Geissele Automatics, renowned for their battle-proven components, this complete upper delivers exceptional accuracy and modularity in a compact package, perfect for close-quarters maneuvers or customizable rifle configurations.

Key Features

• Cold Hammer Forged Barrel: The 12.5-inch medium-profile barrel, finished in Mag Phosphate, features a chrome-lined bore and chamber for enhanced durability and corrosion resistance, ensuring consistent performance even in harsh environments.
• Advanced Bolt Carrier Group (BCG): Includes the Nanoweapon® Reliability Enhanced BCG with a Geissele Stressproof Bolt® and asymmetric cam pin, reducing friction and wear for smoother operation and extended service life.
• Modular Rail System: Equipped with a 12.5-inch SMR MK16 rail in Desert Dirt Color (DDC) for seamless accessory mounting, providing a lightweight yet rigid platform that maintains the rifle’s balance.
• Airborne Charging Handle: Ergonomic design for rapid, ambidextrous manipulation, improving handling under stress.
• Optimized Gas System: Carbine-length gas system with a precisely tuned port to minimize recoil while maximizing reliability across various ammunition types.

Specifications

• Caliber: 5.56 NATO
• Barrel Length: 12.5 inches
• Twist Rate: 1:7 for optimal stabilization of heavier bullets
• Gas System: Carbine
• Muzzle Thread: 1/2×28 for easy suppressor or muzzle device attachment
• Weight: Approximately 74.08 oz (complete assembly)
• Finish: DDC (Desert Dirt Color) for tactical aesthetics and reduced visibility
• Includes: BCG, charging handle, and all necessary components for immediate installation

Why Choose the Super Duty MOD1 Upper?

This upper addresses common pain points like unreliable cycling and excessive recoil in compact builds by integrating Geissele’s proprietary technologies, such as the Super Compact Gas Block and Nanoweapon® coatings, which provide superior lubrication and heat dissipation. Shooters benefit from pinpoint accuracy—thanks to the 1:7 twist and CHF construction—without sacrificing the maneuverability of a shorter barrel. Whether you’re building a defensive carbine or enhancing an existing platform, this MOD1 upper offers unmatched modularity, allowing quick swaps of optics, lights, and grips to suit your mission. Its robust construction withstands rigorous training, delivering confidence in every round fired.

Ready to upgrade your AR-15 with professional-grade performance? The Geissele Super Duty MOD1 12.5″ Complete Upper is your gateway to superior firepower—install it today and experience the difference in precision and reliability.

Frequently Asked Questions

Q: Is this upper compatible with standard AR-15 lowers?
A: Yes, it features a mil-spec Super Duty upper receiver that mates seamlessly with any mil-spec AR-15 lower for a drop-in fit.

Q: Does it include a muzzle device?
A: This complete upper comes with a Nanoweapon®-coated HUXWRX Flash Hider for QD suppressor compatibility, reducing flash and signature.

Q: What makes the DDC finish special?
A: Desert Dirt Color provides a durable, non-reflective coating ideal for desert or arid environments, blending with natural surroundings while protecting against wear.