RAIJIN 25K Short Shaft AEG Motor – FPS

The FPS Softair RAIJIN 25K is a high-performance brushed DC motor designed for airsoft AEG upgrades, combining strong torque output with fast rotational speed. Developed in Italy in collaboration with Damocles and La Tartaruga Softair, it features neodymium magnets, four bearings and a reinforced pinion gear. This short shaft version is intended for compatible AEG motor housings.

Features and technical specifications

• Manufacturer: FPS Softair
• Model: RAIJIN 25K
• Manufacturer part number: DCM25KS
• Type: Brushed DC motor for airsoft AEGs
• Shaft configuration: Short Shaft
• Rated speed under load: 25,000 RPM
• Reference test configuration: 11.1V battery, 13:1 gear ratio and 1-joule AEG
• No-load speed at 11.1V: 31,000 RPM
• Declared torque: 4.20 kgf·cm
• Pure neodymium magnets
• Advanced internal winding conductors
• Long-life, low-friction carbon brushes with copper connections
• Four bearings in total, including two oversized bearings in the aluminium shaft support
• Heat-treated pinion gear manufactured using MIM technology
• Designed for 18:1, 16:1, 13:1 and 12:1 gear ratios
• Suitable for properly configured Dual Sector Gear (DSG) builds
• Designed in Italy
• Manufactured in PRC

Performance and operation

The RAIJIN 25K is engineered to balance trigger response and rate of fire. Its high torque output supports a range of AEG gear configurations, while the neodymium magnets and four-bearing construction promote smooth, stable motor operation.

The heat-treated MIM pinion gear is designed for durability and efficient engagement with compatible bevel gears, helping reduce mechanical noise and wear.

The manufacturer's RPM figures are based on a specific test setup. Actual performance will vary depending on battery voltage, gear ratio, spring load and the overall mechanical configuration of the airsoft rifle.

Compatibility

This short shaft motor is intended for AEG platforms using a compatible short-type motor housing, including many AK, G36, AUG and MP5K configurations.

Before installation, check the gearbox design and motor mounting arrangement. Correct motor height adjustment, pinion-to-bevel gear engagement and electrical wiring compatibility are essential for reliable operation.

The short shaft version is not a direct replacement for AEG configurations requiring a long shaft motor.