Laylax Prometheus Non-Linear AEG Upgrade Spring MS90

Laylax Prometheus Non-Linear AEG Upgrade Spring MS90 is a performance AEG mainspring designed to bring your build to an MS90 power level (site limits depending), using a non-linear (progressive) coil design for smoother compression and more stable cycling. It's a great choice for CQB-focused builds, lower-limit sites, or for restoring performance in an AEG that's dropped FPS over time - when installed and chrono'd correctly.

Set your AEG up for reliable, site-friendly performance with the Laylax Prometheus Non-Linear AEG Upgrade Spring MS90. The mainspring is the foundation of your AEG's power output, and Prometheus (Laylax) springs are trusted by skirmishers who want consistent quality and dependable results. The non-linear design uses progressive coil spacing to help deliver smoother compression through the gearbox cycle, supporting stable operation and consistent output in a well-built setup.

Rated at MS90, this spring is ideal for players tuning for CQB limits, indoor sites, or simply building a snappy, responsive rifle without pushing higher power levels. As always, final FPS depends on your cylinder volume, barrel length, air seal, and overall build - so it's essential to chrono after installation to ensure you're within your site's limits.

Key Features

• Prometheus / Laylax AEG upgrade spring
• MS90 rating for lower-to-mid power setups (chrono required)
• Non-linear (progressive) coil design for smoother compression and cycling
• Ideal for CQB, indoor sites, and site-friendly builds
• Great for replacing a tired spring to restore consistency

Specifications

• Brand: Laylax (Prometheus)
• Product Type: AEG upgrade spring (mainspring)
• Rating: MS90
• Compatibility: Most standard AEG gearboxes (confirm if your listing specifies V2/V3/QCS)