Laylax Prometheus Non-Linear AEG Upgrade Spring MS120 (Emerald)

Achieving maximum effective range in electric airsoft replicas requires a consistent, high-output power source. The LayLax Prometheus Non-Linear AEG Upgrade Spring MS120 (Emerald) combines advanced Japanese metallurgy with an irregular pitch design to deliver high velocity without placing excessive instantaneous torque strain on your gearbox components.

Non-Linear Coil Geometry for Reduced Mechanical Strain

Standard linear springs compress evenly across their entire length, forcing the motor and bevel gear to overcome maximum mechanical resistance right at the start of the pick-up cycle. The irregular pitch layout of the Prometheus non-linear spring features unevenly spaced coils. The tighter coils compress first, allowing the motor to build momentum easily during the initial cycle phase. The wider coils then compress to store full kinetic power, resulting in a smoother overall gearbox cycle and lower battery amp draw.

Premium Oil-Tempered Steel & Emerald Color Coding

Manufactured from high-grade oil-tempered steel wire, the MS120 spring undergoes specialized stress-relieving heat treatments to prevent spring fatigue and sag. Unlike lower-tier springs that lose compression and drop FPS over high-volume use, Prometheus springs maintain their length and tension over thousands of rounds. For quick organization in tech workbenches, this spring features a durable emerald-green finish that lets you identify the MS120 power rating at a glance.

High-Velocity Output for Outdoor & Long-Range Builds

Engineered for players needing increased muzzle velocity for long-distance outdoor skirmishes, the MS120 rating yields approximately ~380 to ~420 FPS on a standard 0.20g BB setup (subject to barrel length, cylinder ratio, and air seal tightness). It is an ideal drop-in power upgrade for DMR conversions, outdoor field assault rifles, and high-torque gearbox builds.

Key Features & Technical Benefits:

• Irregular Pitch (Non-Linear) Design: Smooths out gearbox compression cycles and minimizes motor startup stress.

• MS120 Power Rating (~380–420 FPS): Delivers high muzzle velocity and extended energy output for outdoor play.

• Oil-Tempered High-Tensile Steel: Exceptional fatigue resistance prevents spring sag and velocity drop over time.

• Emerald Color-Coded Finish: Bright emerald coating allows instant identification of spring tension.

• Universal AEG Fitment: Compatible with standard Version 2, Version 3, Version 6, and quick-change AEG gearboxes.

Tech Tip: When installing an MS120 or higher, we recommend using a ball-bearing spring guide to prevent spring kinking and ensure a smooth, linear power delivery.