The Geissele Automatics Geissele Sd Mod1-A Sbr 8" 300blk Blk is a compact short-barreled rifle built around the proven Super Duty Mod1-A platform. It features a cold hammer forged, chrome-lined 8 inch barrel with a 1:7 twist and a Huxwrx QD 762 flash hider, delivering dependable accuracy and smooth recoil in a maneuverable package. Fully ambidextrous controls mirror Geissele’s professional-grade GFR and MRGG layouts, giving shooters intuitive access to all major functions from either shoulder.

This model is chambered in 300 Blackout and is equipped with a Super Duty ambidextrous receiver set, Reliability Enhanced Bolt Carrier Group, SSA-E X with Lightning Bow trigger, Geissele Ultra Duty lower parts kit, and a Super 42 buffer spring paired with an H1 buffer. These components work together to provide a clean trigger break, consistent cycling, and long-term durability, making the rifle well suited for range work, training, and general-purpose defensive roles. The build reflects Geissele’s reputation for meticulous machining and thoughtful engineering.

Key Features:

• Manufacturer: Geissele Automatics
• Model: Super Duty Mod1-A SBR 8" 300 BLK
• Caliber: 300 Blackout
• Action: Semi-Automatic
• Barrel Length: 8"
• Threaded Barrel: Yes
• Unique Features: Super Duty Ambidextrous Receiver Set, Reliability Enhanced Bolt Carrier Group, SSA-E X With Lightning Bow Trigger, Huxwrx QD 762 Flash Hider, Super 42 Buffer Spring With H1 Buffer