Sig Sauer MPX-K Sportsline (Black) with Pre-Installed Wolverine INFERNO Gen 2 Engine, Spartan Board & FCU Battery

Building an ultra-compact HPA submachine gun using proprietary bodies usually comes with gearbox fitment headaches and custom alignment challenges. The Sig Sauer MPX-K Sportsline HPA Rifle eliminates the workbench hassle completely, offering an expert-assembled, turn-key build powered by the legendary Wolverine INFERNO Gen 2 HPA System.

Wolverine INFERNO Gen 2 Engine & Hybrid Technology

At the core of this licensed SMG lies the Wolverine INFERNO Gen 2, celebrated globally for its innovative single-solenoid technology and independent nozzle movement. By combining the air efficiency of an open-bolt system with the feeding precision and hop-up seating stability of closed-bolt designs, the INFERNO Gen 2 virtually eliminates misfeeds and nozzle misalignment. This translates into laser-flat trajectories, tight shot groupings, and maximum air efficiency from every tank fill.

Officially Licensed Ergonomics & Integrated Spartan Control

The MPX-K Sportsline platform features a high-density polymer receiver set paired with authentic Sig Sauer rollmarks, delivering lightweight durability without slowing you down in close-quarters engagements. The short M-LOK handguard allows quick attachment of tactical lights and foregrips, while the rear rail accommodates folding stocks or sling mounts. Controlled via the integrated Spartan Board FCU, players can fine-tune dwell time, rate of fire, and burst modes directly through trigger inputs—no bulky external control boxes or complicated phone apps required.

Key Features & Technical Benefits:

• Officially Licensed Sig Sauer Replica: Features authentic MPX-K markings, controls, and ergonomic styling.

• 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 activation removes mechanical gear delay for instantaneous shots.

• Ultra-Compact CQB Footprint: Tailored for room clearing, fast corner peaking, and aggressive field movement.

• 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 receiver or stock/rail 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 the rifle is stored to prevent deep discharge.