Double Bell M416 AEG (Tan - Long - BY-812S) with Pre-Installed Wolverine INFERNO Gen 2 Engine, Spartan Board & FCU Battery

Upgrading a full-length 416-style rifle into a high-performance HPA system can often present nozzle alignment challenges, barrel length volume tuning, and complex wiring setup. The Double Bell M416 Long Tan HPA Rifle (BY-812S) removes all technical friction, coming expert-assembled and powered by the industry-leading Wolverine INFERNO Gen 2 HPA System.

Wolverine INFERNO Gen 2 Engine & Hybrid Technology

At the heart of this build lies the Wolverine INFERNO Gen 2, celebrated worldwide for its single-solenoid architecture 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, laser-flat trajectories over distance, and maximum gas efficiency out of every tank fill.

Classic 416 Ergonomics & Integrated Spartan Control

The Double Bell BY-812S platform features iconic 416 receiver lines paired with an extended Picatinny quad-rail handguard, offering maximum real estate for optics, bipods, tactical lights, and foregrips. Its extended barrel length provides enhanced stability and range for open-field skirmishing. 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.

Key Features & Technical Benefits:

• Iconic 416 Platform Styling: Full-metal alloy receiver set and quad-rail handguard finished in tactical Tan.

• 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.

• Extended Quad-Rail Handguard: Ample Picatinny real estate for tactical optics, grips, magnifiers, and accessories.

• 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 buffer tube or stock compartment. 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.