FPS 90 m/s Spring for Airsoft Replicas

The FPS 90 m/s spring is designed to enhance the performance of airsoft replicas, providing an ideal balance between power and reliability. This spring is specifically calibrated for barrels of 363 mm length and gearboxes with a type D cylinder, suitable for barrels ranging from 301 to 400 mm. Performance may vary with shorter or longer barrels, necessitating a stiffer or softer spring depending on the requirements.

Technical Features:

• Material: Made from blued and pre-tempered carbon steel wire, with added silicon and chromium EN10270 / 2, ensuring superior durability and resistance.
• Stabilization: The spring is heat-treated at 400°C for 30 minutes after formation, optimizing its lifespan and performance consistency.
• Design: Features variable pitch coils in the central area and contact points with the spring guide, with end grinding to ensure optimal performance during compression.

Dimensions:

• Length: 170 mm
• Outer Diameter: 14.30 mm

Usage Recommendations:

• Compatibility: Suitable for barrels ranging from 301 to 400 mm and gearboxes with a type D cylinder.
• Additional Performance: Consider an approximate performance increase of 2.5 m/s for each bearing used in the spring guide and piston head.

The FPS spring is 100% Made in Italy, produced in collaboration with leading industry companies to ensure high quality standards. To achieve maximum performance and longevity, it is recommended to use this spring in conjunction with bearing spring guides and piston heads.

Warnings & maintenance

Do not tamper: do not disassemble, grind or alter piston, tappet-guide, O-rings or metal parts; unauthorised changes can impair gearbox function and cause damage.

Installation: fitting requires disassembly of piston/cylinder group and competence with sniper/AEG internals; if unsure, use qualified technicians to avoid damage to cylinder, head, gears or piston.

Storage: store in a dry, temperate environment; avoid moisture, corrosive agents and heat that could damage materials or O-rings.

Removable parts / maintenance: replace worn O-rings with original spares and check UREPAN seating; use recommended lubricants for internals and service through authorised centres for major repairs.

Test safety: wear eye protection during bench testing and assembly; perform low-rate initial tests to verify timing and operation before normal use. Keep out of reach of children.
These warnings are written in clear language and comply with GPSR Regulation and applicable Italian law.