Airsoft Repair Case: a G&G SRL M-LOK with a Perun V2 Hybrid suddenly stopped working during a game.
Service Date: 10/18/2023
Brand: G&G
Model: SRL M-LOK AEG
Previous Upgrade: Perun V2 Hybrid installed about one year earlier
Problem: The gun stopped working during a game
Customer’s Problem
The customer said the gun had been working normally, but it suddenly stopped in the middle of a game. The rifle had been upgraded with a Perun V2 Hybrid about one year earlier.
What We Found
Testing showed that the original 25KRPM motor had failed. Because the motor was dead, it could no longer turn the gears and cycle the gearbox.
The Perun V2 Hybrid did not directly cause the motor to fail. However, features such as pre-cocking, active braking, a sensitive trigger, and fast semi-auto shooting can make the motor start and stop more often and work harder. A stronger battery, heavy spring, poor shimming, incorrect motor height, or worn gears can add even more load. All of these factors can create extra heat and shorten the life of a standard brushed motor.
Why the Motor Wore Out Faster
A regular motor uses carbon brushes that rub against the commutator every time the motor runs. Fast semi-auto shooting creates many quick start-and-stop cycles, which increases heat and brush wear.
Pre-cocking also keeps the spring partly compressed after each shot. This gives faster trigger response, but the motor must pull the piston back under load.
Active braking stops the motor quickly after each cycle. It helps control overspin, but a strong braking setting can create more heat and wear inside a brushed motor.
Repair Completed
We replaced the failed motor and tested the rifle. The gun returned to normal operation.
A good brushed motor can work with a Perun V2 Hybrid. However, for a gun that uses pre-cocking, active braking, fast semi-auto fire, or a heavier gearbox setup, a compatible brushless motor may be a better long-term choice.
Why a Brushless Motor May Be Better
- No carbon brushes:
There are no brushes rubbing inside the motor and wearing out over time. - Less heat:
A brushless motor usually runs cooler and wastes less energy. - Better response:
It can start quickly and pull the gearbox more smoothly under load. - Longer service life:
With fewer wear parts, it can last longer in a heavily used AEG.
The Gearbox Must Be Checked Too
A new motor can have a different speed, torque level, and pinion gear from the original motor. After the motor is changed, the motor height and gear contact must be checked.
The gearbox may also need to be reshimmed so the gears line up correctly and run smoothly. Poor gear contact can create noise, heat, and extra stress on the new motor.
The gears do not always need to be replaced. Replacement depends on their condition and the motor being installed. If the gun will be used heavily, steel-tooth gears are recommended for better durability.
Final Recommendation
The motor, Perun settings, battery, spring, gears, and shimming all work together. Replacing only the motor without checking the rest of the gearbox can cause the same problem again.
For normal use, a good brushed motor may still be enough. For heavy use, fast semi-auto shooting, or a stronger build, a properly matched brushless motor and steel-tooth gears may provide better reliability.
Need Airsoft Repair or Upgrade Service?
Airarm Sports provides AEG diagnosis, motor replacement, gearbox service, reshimming, MOSFET and ETU setup, and performance upgrades for supported airsoft platforms.