The MARV2/V3 anti-reversal spring is a high-quality spare part designed to prevent reverse rotation of gears within V2 and V3 gearboxes. Manufactured from burnished, pre-hardened carbon steel wire with silicon and chromium additions (EN10270-2), each spring is oven-stabilised at 400 °C for 30 minutes immediately after forming to maximise fatigue resistance and longevity.

Made entirely in Italy in collaboration with specialist manufacturers, the MARV2/V3 is suitable for workshops, technicians and enthusiasts performing maintenance or overhauls: it delivers consistent elastic behaviour, low deformation risk and longer service life compared with unstabilised springs. Replacing a worn anti-reversal spring is essential to maintain gearbox mechanical safety and reliable operation.

Concrete user benefits: improved anti-reverse reliability, lower risk of accidental gear inversion, extended service life due to thermal treatment and high-grade material.

Technical features & specifications

Product code: MARV2/V3

Type: anti-reversal spring for V2 and V3 gearboxes (Marui-style / AEG standard)

Material: carbon steel wire, EN10270-2 (Si/Cr alloy), burnished and pre-hardened

Heat treatment: oven stabilisation 400 °C × 30 min after forming

Origin: 100% Made in Italy

Application: anti-reverse latch spring (replacement / maintenance)

Availability: Available

Package contents

1 MARV2/V3 ANTI-REVERSAL SPRING

Warnings & maintenance

Do not tamper: do not cut, stretch or reshape the spring; unauthorised alterations can impair gearbox function and create unsafe conditions.

Installation: gearbox disassembly skills are required; if unsure, have a qualified technician perform the replacement to avoid damage to gears, piston or tappet-plate.

Post-installation checks: after fitting check anti-reverse operation, perform low-rate testing and inspect for abnormal wear; use suitable lubricants for internal parts.

Storage: store in a dry, temperate environment; protect from moisture and corrosive agents that could affect surface treatment.

Safety: wear eye protection during bench tests and assembly; keep out of reach of children.
These warnings are drafted in plain language and comply with the GPSR Regulation and applicable Italian law.