Every airsofter wants a little bit extra from their AEG.  You may not want a 40rps rof monster but it can’t be denied that a snappy rate of fire and quick trigger response will give you confidence in the heat of a skirmish to engage targets, be more agressive and generally have more fun.

Outlined below are 12 easy ways to improve your AEG’s rate of fire, trigger response and reliability.


These methods are free and you can do them right now. They offer small improvements to Rate of Fire but huge improvements to durability.

1. Clean 

Cleanliness is key! A dirty gearbox can cause undue wear and tear. Before doing anything else, crack open that gearbox and remove any and all gunk, debris, lubrication and manufacturing oils. If you’ve never cleaned out your gearbox, there’s a chance that its still lubricated with its original factory lubrication and that it’s filled with debris from operation. This grime can inhibit the mechanical movements within the gearbox and act as an abrasive over time, thus lowing the gearbox’s life span. Simply removing the dirt and grime will allow your gearbox to spin freely and lessen resistance inside the gearbox, thus improving RoF, trigger response and reliability.

2. Lube

Lubrication ensures that everything in your gearbox slides and spins with minimal resistance. No lubrication inside the gearbox will result in severe resistance and drastically reduce your AEG’s durability, not to mention rate of fire and trigger response. However, too much lubrication can actually inhibit the gearboxes movement and can store dirt and debris that can damage the gearbox. Due to this, you should only apply a ‘light film’, you should be able to see through the lubrication.

Ensure that you use the correct lubrication for the part that you’re lubricating. The general rule of thumb is:

Metal on Metal: Lithium Grease

Plastic on Metal: Silicone Oil

Plastic on Plastic: Silicone Oil

We recommend Abbey Gun Solutions for airsoft lubrication.

3. Swiss Cheese

Swiss Cheese in a method that involves removing material from your AEG’s piston to allow it to move faster within the gearbox.

Imagine you’re pushing a car back and forth, it’s heavy and it takes you a long time to move it from point to point. Now imagine you’re pushing a bike! It’s much faster because it’s so much lighter, it takes less energy to accelerate and decelerate it. The same principle applies to the piston within your AEG, it moves back and forth to fire BBs and does it much faster when it’s shed some weight.

As the name suggests, the act of Swiss Cheesing a piston involves drilling multiple holes in the piston to remove material and make it lighter.

This is an excellent, free way to add a few rounds per second to your AEG. However, make sure that you don’t remove too much material, you’ll compromise the strength of the piston and cause it to prematurely fail.

If you don’t feel like taking a drill to your piston, simply replacing your piston with a lighter one is sufficient! Check out our range of pistons and find one that’s perfect here.

4. Short Stroke

In a similar vain to removing weight from the piston, lessening the distance that the piston has to travel will also increase rate of fire.

By removing the final pick up teeth from your AEG’s sector gear it will cause the piston to return earlier than usual. How many teeth you remove is up to you. The more teeth you remove, the less the piston will travel, raising the rate of fire. However, the less the piston moves, the less air it pushes down the barrel, thus lowering the FPS. Putting in a higher rated spring will help compensate for this.

5. AOE

Correcting your AEG’s angle of engagement ensures that your gears start pulling on the piston at the most optimum angle. Correcting this angle so that the gears make the most surface area at first contact results in a much smoother AEG operation and leads to slightly higher RoF and a longer AEG life span.

When correcting your AOE, sometimes you’ll have to remove a tooth from the piston. If you don’t like the sound of that, just purchase a piston with it already removed! They’re all listed here.


These following methods are cheap and cheerful methods that will really make your AEG shine. These upgrades can be done for less than £7 each and make great improvements to all AEGs.

6. Shim

Shimming is the process of placing small pieces of metal on the axles of your AEG’s gears in order to remove any movement along the axis and to ensure that the gears are meshing at the most optimal angles. Ensuring that the gears mesh at the perfect angle allows all the energy to be transferred into moving the piston and not into twisting the gears off axis.

Shims are a very low cost method of optimising your AEG’s operation and improving its rate of fire, trigger response and reliability.

7. Re-Wire

AEGs run on electricity! Who knew. Your AEG needs electricity to work and to work well it needs high quality, flawless wiring. Every connection, crimp or nick in your wiring can introduce resistance which (in simple electrical terms) reduces the performance of your motor. You want to make sure that your AEG’s wiring is as low gauge as acceptable and from high quality material. Silver wiring offers the highest conductivity, but is obviously expensive and susceptible to oxidation.

With high quality wiring your AEG’s motor can draw as much current from the battery as it can, without being restrained by the wiring, optimising performance.

Check out our range of high performance wiring for your AEG.

9. Battery Connector

In a similar vain to high quality wiring, your AEG’s battery connected is a huge bottle neck that can introduce resistance into your AEG’s wiring. Stock Tamiya connectors are widely considered to be the worst of the battery connectors yet come stock on the majority of AEGs and batteries. Tamiya connectors offer a very small area for current to flow through and are generally relatively fragile.

Deans or T-connectors are widely considered to be a better alternative. They offer a much greater connecting surface area and are often gold plated offering a huge reduction in resistance over Tamiya connectors.

9. Battery

The quality of your AEG’s battery can seriously affect its performance. A lot of factors can change the way a battery performs and it’s important to use a battery that can deliver the power your AEG requires in every situation.

The C rating of a battery describes the continuous discharge rate of the battery. The C rating is the maximum amount of amps that the battery can discharge at any one time (discharge rate = C × maH). If your battery can’t supply the AEG’s motor with sufficient amperage, it will not spin as fast as it could.

The maH rating (milliamp hour) on your battery determines how long your battery will last. In simple terms, if your AEG uses. 100 milliamps (ma) per hour, a 1000 maH battery will last for 10 hours (numbers purely for explanation). Without a sufficient maH rating, your battery will run out of battery sooner than expected.


These methods aren’t the cheapest methods, but they’re not break the bank expensive either if you know what you’re doing. They’re tried and tested methods that can make a huge difference to the performance of your AEG.

10. Gearing

Your standard AEG’s gearbox will come with 18:1 gears. For every 18 turns of the motor, you’ll get 1 turn of the sector gear, resulting in 1 shot from the gearbox.  High speed gears will have a ratio of 13:1 or even as low as 12:1, resulting in a theoretical 60% increase in RoF.
Why theoretical? Well, just like riding a bike, the lower the gearing the harder it is to peddle. If your motor doesn’t have enough grunt to pull your gearing, you won’t see much improvement. We suggest pairing a high torque motor with high speed gears. See 11 for details.

Shop here for high speed gears!

11. Motor

High speed motors are a great way to increase your rate of fire. They’re optimised to offer the highest revolutions per minute for high rate of fire builds. However, this comes with a trade off, it limits torque. If you don’t have enough torque in your motor, you’ll hear it struggle to pull some springs. High speed motors are great for low fps builds but if you’re looking for something both high speed and higher fps you’ll need a motor with more grunt.
High torque motors have a higher torque than high speed motors, but spin slower. They’re great for pulling heavy loads like high fps springs or low gears.
For this reason we suggest pairing a high torque motor with high speed gears. With this set up, you get the high speed rate of fire from the high speed gears and a snappy trigger response from the high torque motor.

Shop here for high torque motors that will up your Rate of Fire.

12. Mosfet

Mosfets, in airsoft, are devices that take the ‘trigger pull’ signal from your AEG and lets electricity flow directly from the battery to the motor. This helps to improve your RoF due to the huge amount of electrical resistance that it removes.
Most modern mosfets also incorporate a microcontroller in them. This allows the opportunity to add some functionality to an AEG that would previously only be available on high end models. The ability to change your firing and burst modes, lipo protection, pre-cocking etc. can all be added by these small inexpensive units.

That’s all folks! There’s a rumour that you can’t have a high rate of fire and a reliable AEG.
We at Major Airsoft don’t agree. Provided the right information, a bit of patience and a willingness to tinker; you can build and AEG with a respectable fearsome rate of fire that will last all game day, every game day.

Thanks for reading.
Thanks for Airsofting.

Major Airsoft.