Double Eagle 9 Seres AEG SMG (M931A) with Pre-Installed Wolverine INFERNO Gen 2 Engine, Spartan Board & FCU Battery

Building an ultra-compact HPA submachine gun often requires custom nozzle fitting, gearbox alignment, and intricate electronic wiring. The Double Eagle M931A HPA Rifle removes all technical friction, coming fully assembled and expert-tuned with the industry-leading Wolverine INFERNO Gen 2 HPA System.

Wolverine INFERNO Gen 2 Engine & Hybrid Technology

At the heart of this compact platform lies the Wolverine INFERNO Gen 2, world-famous for its single-solenoid design and independent nozzle movement. By combining the pneumatic air efficiency of open-bolt mechanics with the feeding accuracy and hop-up seating stability of closed-bolt systems, the INFERNO Gen 2 ensures precise nozzle positioning before every shot. The result is exceptionally consistent shot-to-shot velocity, tight groupings, and maximum air efficiency from every tank fill.

Lightweight PCC Ergonomics & Integrated Spartan Control

The M931A platform features a durable high-density polymer receiver, a modular handguard for tactical accessories, ergonomic controls, and a multi-position stock built for fast maneuvering in tight spaces. Controlled via the integrated Spartan Board FCU, players can easily fine-tune dwell time, rate of fire, and burst modes directly through trigger inputs—eliminating the need for external programming boxes or complicated phone apps. Simply hook up your airline and regulator to dominate the field.

Key Features & Technical Benefits:

• Modern 9mm PCC Design: Compact submachine gun form factor tailored for high-speed CQB skirmishes.

• Pre-Installed Wolverine INFERNO Gen 2: Premium single-solenoid HPA engine offering superior air efficiency and precision nozzle seating.

• Spartan Board FCU Control: Easily adjust dwell, rate of fire, and burst modes directly through trigger inputs.

• Included FCU Battery: Comes supplied with a dedicated LiPo FCU battery to power internal solenoids out of the box.

• Instant Trigger Response: Solenoid-driven activation completely removes mechanical gear delay for instantaneous shots.

• Agile Tactical Build: Lightweight construction paired with modular accessory mounts and a quick-adjust stock.

• Fully Adjustable Output: Easily adjust FPS and rate of fire through your external HPA regulator and FCU parameters.

Tech Installation & Usage Guidance

To set up, connect the included FCU battery to the Spartan Board wiring harness inside the stock compartment or buffer tube. Connect your high-pressure air line (standard QD fitting) to the lower grip line. Set your external regulator within the engine's recommended operating pressure range (typically 60–120 PSI) prior to firing. Always disconnect the FCU battery when storing the rifle to prevent deep battery discharge.