Metal Spring Retainer for JM Gen8/9/10/11/12/13/15 or BF P90

Eliminate spring guide failures with our CNC-machined metal retainer, designed for maximum durability across all JM Gen8-15 and BF P90 platforms. This precision-engineered component prevents gearbox damage while maintaining perfect spring alignment for consistent performance.

Key Benefits:

Universal JM Platform Compatibility

✔ Two variant designs cover all JM generations:

• Type A: Fits JM J8/J13 & BF P90

• Type B: For J9/J10/J11/J12/J15 models

Professional-Grade Construction

• High-strength metal alloy withstands M120+ springs

• Precision machining ensures perfect fit

• Anodized finish resists corrosion (color may vary)

Why Upgrade?

• Stops spring guide wobble and misalignment

• Prevents gearbox shell cracking

• Essential for high-power spring upgrades

• Direct replacement for weak plastic retainers

Technical Specs:

• Material: Aircraft-grade metal

• Color: As pictured (varies by stock)

• Package: 1x spring retainer (specify your model)

Installation Note:

• Type A: JM J8/J13 & BF P90

• Type B: JM J9-J12/J15

Protect your gearbox investment - upgrade to metal reliability today!