Sig Sauer MCX MPX - Black - HPA with a Wolverine Inferno 2 Spartan Edition

Core Build & Platform

• Officially licensed SIG AIR/VFC ProForce MPX platform in full-metal construction, featuring polymer stock and ambidextrous controls, replicating the real steel ergonomics and feel.

• Submachine-gun style (SMG), compact CQB platform with full-auto capability.

HPA Engine: Wolverine Inferno Gen 2 Spartan Edition

• Equipped with the Wolverine Inferno Gen 2 Spartan Edition HPA system - a drop-in hybrid unit combining open/closed bolt design, known for superior air efficiency (10-15% gain), no first-round dry-fire, and tunable dwell & rate of fire on the fly

• Hybrid single-solenoid/popppet system delivers crisp trigger response and reliable performance

• "Live-fire tuning" Spartan electronics simplify tuning during use

Performance Specs

• FPS: 300-350 fps on 0.20 g BBs, with excellent consistency across shots.

• Fire Modes: Safe / Semi / Full-Auto.

• Hop-up: Adjustable unit installed.

• Magazine: Uses MPX mid-cap mags (usually 100-120 rounds), front-wired for HPA and powered by Jensen-standard 7.4-8.4 V JST battery.

Summary

• Platform: Licensed, full-metal SIG ProForce MPX in matte black.

• Engine: Wolverine Inferno Gen 2 Spartan HPA - a top-tier hybrid HPA engine with live tuning.

• Performance: 300-350 fps, efficient air use, crisp trigger, tunable on the move.

• Quality: Reliable and smooth operation with some refinement needed for wobbly parts common to MCX series.

Bottom Line: This is a premium, custom-built HPA SMG with pro-level hardware. If you're seeking a compact, high-performance HPA setup in SIG's iconic MPX form factor, this is one of the best you can get.