Guarder SP-140 Oil-Tempered AEG Tune-Up Spring for TM-Spec Gearboxes (GG08-09)

The Guarder SP-140 Oil-Tempered AEG Tune-Up Spring is a performance upgrade spring designed for compatible Tokyo Marui-spec airsoft AEG gearboxes.

Constructed from oil-quenched and tempered Si-Cr alloy steel wire, the SP-140 is designed for durability, resistance to fatigue, and consistent spring performance under repeated compression. The uneven-pitch design provides progressive compression, while the ends are polished for proper seating inside the gearbox.

The SP-140 is a high-power spring intended for appropriately upgraded AEG builds. Actual muzzle velocity will depend heavily on the marker's compression efficiency, cylinder volume, barrel dimensions, hop-up components, BB weight, and other internal parts.

Key Features

• Guarder SP-140 power rating
• Oil-quenched and tempered spring construction
• Si-Cr alloy steel wire
• Uneven/progressive pitch
• Polished spring ends
• Designed for consistent compression
• High resistance to fatigue and wear
• Compatible with most TM-spec AEG gearboxes
• Not compatible with Tokyo Marui PSG-1
• Manufactured in Taiwan

SP-140 is a high-power spring (450-480 FPS). Actual muzzle velocity will vary depending on compression efficiency, barrel configuration, cylinder volume, BB weight, and other internal components. Chronograph the AEG after installation.