Premium CNC Gearbox for M249/PKM Airsoft Replicas – Durable & High-Performance

Upgrade your airsoft LMG with our precision-machined CNC gearbox, specifically designed for M249 and PKM replicas. Crafted from aircraft-grade EN AW 7075 T651 aluminum (Dural), this gearbox delivers superior strength (590MPa)—outperforming standard steel (390MPa) and zinc-aluminum alternatives. Built for extreme durability, it’s milled from a solid block using high-precision CNC machines for flawless fit and resilience.

Key Features & Improvements:

✔ Ultra-Strong Material: Resists wear and stress better than standard gearboxes.
✔ 8mm Bushing/Bearing Sockets: Precision-tuned to 7.98mm for secure fit and anti-rotation.
✔ Quick Spring Change (QSC) System: Swap springs effortlessly without full disassembly—ideal for field adjustments.
✔ Reinforced Threads & Grooves: Milled edges and shaped threads enhance longevity and alignment.
✔ Anti-Corrosion Anodizing: Protective coating prevents oxidation, even on tough 7075 aluminum.
✔ Lightweight Yet Robust: Redesigned critical areas reduce weight without sacrificing strength.

Installation Notes:

• Compatible only with Tokyo Marui-standard replicas (including internals).
• Use 1Nm torque on screws—avoid over-tightening to prevent damage.
• Avoid MAXX cylinder heads; opt for standard springs (higher-power springs may reduce lifespan).

Package Includes: CNC Gearbox (8mm) + Screw Set.

Engineered for airsoft enthusiasts who demand reliability, our gearbox ensures smoother performance, easier maintenance, and unmatched durability—perfect for competitive play or milsim scenarios.

Note: For folding/stockless setups, secure the spring guide with the included QSC screw.