
The Geissele Super Duty MOD1 .300 Blackout represents the current evolution of Geissele's proven platform, incorporating continuous design development to deliver superior ergonomics and modularity while maintaining the established balance of performance and reliability. This complete upper receiver group features cutting-edge firearm technology available exclusively from Geissele Automatics, specifically engineered to optimize .300 Blackout performance across all ammunition types.
The Super Duty MOD1 .300 Blackout incorporates Geissele's proprietary Phased Array gas system technology, which represents a significant advancement in gas system design. Rather than relying on a single gas port, this system utilizes multiple carefully engineered ports to achieve precise gas regulation. This innovation ensures consistent cycling performance whether shooting suppressed or unsuppressed, with both supersonic and subsonic ammunition loads.
The 8" cold hammer forged barrel features chrome lining throughout the bore and chamber, providing enhanced durability and corrosion resistance. The 1-8 twist rate is optimized for stabilizing the full range of .300 Blackout projectile weights commonly available. The custom pistol-length gas system works in conjunction with the Phased Array technology to deliver smooth, reliable operation.
The Reliability Enhanced Bolt Carrier Group represents years of development and refinement. The carrier is machined from mil-spec 8620 steel and features extended upper rails for enhanced stability and feeding reliability. The Stressproof Bolt is manufactured from Carpenter 158+ steel, developed in collaboration with Carpenter Steel metallurgists to create material with reduced impurities and enhanced fatigue resistance. Each bolt undergoes rigorous inspection, high-pressure testing, and magnetic particle inspection before receiving the Nanoweapon coating.
Geissele's Nanoweapon coating technology, developed from Picatinny DSL, provides surface hardness equivalent to synthetic diamond. This coating rejects carbon buildup, simplifies cleaning, and allows the firearm to operate with reduced lubrication while maintaining superior corrosion and wear resistance.
The 7" SMR MK16 rail system incorporates the center tab design that mates precisely with the upper receiver, eliminating any possibility of rail rotation while providing a robust mounting platform for accessories. The rail features M-LOK attachment points throughout its length for versatile accessory mounting options.
SPECIFICATION | DETAILS |
---|---|
Overall Length | 17 1/8" |
Weight | Approximately 3.3 lbs |
Caliber | .300 Blackout |
Finish | Black |
Upper Receiver | Super Duty with cam pin cut-out |
Bolt Carrier Group | Nanoweapon Reliability Enhanced BCG |
Bolt | Geissele Stressproof Bolt with Asymmetric Cam Pin |
Rail System | 7" SMR MK16 with Geissele Center Tab |
Barrel | 8" CHF, Chrome-Lined, 1-8 Twist |
Gas System | Custom Pistol Length with Phased Array |
Gas Block | Antistrike Super Compact Gas Block |
Charging Handle | Airborne Charging Handle |
Buffer Assembly | Geissele Mil-Spec Braided Buffer Spring and H1 Buffer |
Muzzle Device | HUXWRX Flash Hider-QD 762 |
Muzzle Threading | 5/8X24 |
Part Number | 08-553B |