ASG Spring M120 Scorpion EVO 3 A1 - Airsoft Spring, 400 FPS | Item No. 18179

M120 ASG Spring: Technical Specifications

The M120 ASG spring, part number 18179, is a genuine replacement part designed for the CZ Scorpion EVO 3 - A1. Made of solid metal, it is sized to the manufacturer’s specifications for installation in the replica’s gearbox without modification. Its construction ensures consistent and repeatable compression throughout all firing cycles.

Product Features

• Brand: ASG (ActionSportGames)
• Spring Rating: M120
• Manufacturer Part Number: 18179
• EAN: 5707843060936
• Material: Metal
• Muzzle velocity: approximately 400 FPS (0.20 g BB)
• Type: High-power airsoft spring — standard replacement part

AEG Gearbox Compatibility

This spring is primarily designed for the CZ Scorpion EVO 3 - A1. Its standard geometry also makes it interchangeable with most standard AEGs on the market. It is therefore a versatile investment for any technician who maintains multiple replicas.

Compatible Replicas

• CZ Scorpion EVO 3 - A1 (primary compatibility)
• Most standard AEGs (Gearbox Version 2 and compatible models)

AEG Installation and Internal Upgrade

Replacing the spring is one of the most common procedures for adjusting or restoring an AEG’s FPS output. The M120 spring is part of a maintenance or internal upgrade process: it can replace a worn-out spring or be installed to achieve a target power of 400 FPS, a common limit at many regulated playing fields in France.

Expert Opinion

"On the Scorpion EVO, generic springs often cause issues with gearbox side play or premature piston wear. Opting for the official ASG part number 18179 helps you avoid these kinds of headaches: the dimensions are precise, the compression is consistent, and the 400 FPS power holds up over time. It’s a minimal investment for real-world reliability on the field.”