The SP140 spring from Guarder is a tuning spring for AEGs made from SiCr spring steel subjected to heat treatment and oil-dip to enhance durability and corrosion resistance. The nominal strength (31.24 lbs) is provided as a tuning reference; actual muzzle velocity depends on system sealing and the combination of internals installed. For repeatable results, pair the spring with compatible components (piston, cylinder head, seals, etc.) and perform controlled tests.
Concrete benefits for the end user: dimensional stability, protective surface treatment for long life, and a clear reference value for internal upgrades.

Technical features & specifications

Product: Guarder SP140 AEG Tune-Up Spring

Material: SiCr spring steel, heat treated and oil-dipped

Spring strength: 31.24 lbs

Reference note: nominal value referenced to tests with 0.20 g BBs; actual conversion depends on system sealing and internals

Packing dimensions (approx.): packed length ~23 cm x width 4 cm x height 2 cm

Weight: ~0.02 kg (packed weight 0.023 kg)

Package contents

1 AEG SPRING

Warnings & maintenance
Do not tamper, bend or modify the spring in any way: unauthorized alterations may impair safety and function. Store the spring in a dry place away from heat and humidity to prevent corrosion or degradation of the surface treatment. Keep out of reach of children.
Installation should be carried out by experienced personnel or users familiar with gearbox disassembly and reassembly: improper installation can damage gears, piston or cylinder and represent a safety hazard. When tuning, validate combinations of internals and proceed with controlled tests; highly efficient sealing may require selecting a lower nominal spring rating. No batteries or electrical parts are included. For maintenance, periodically inspect the spring and its housing, remove debris and avoid aggressive solvents that may affect the surface treatment.
These warnings comply with the GPSR Regulation and applicable Italian law.