AEG maintenance: the basics for a longer lifespan
2026-09-14
Ook in het Nederlands: NL
Your AEG (Automatic Electric Gun) is the workhorse for most airsoft players. With a bit of regular maintenance it keeps firing reliably, feels more consistent and you avoid costly repairs. The good news: the basics are easy to do yourself, without opening up the gearbox. This guide walks through the key points, general enough to apply to almost any AEG.
Cleaning the barrel
Over time the inner barrel collects dirt, BB residue and a bit of lubricant. That costs you accuracy and consistency. Cleaning is simple:
- Use a cleaning rod with a piece of clean cloth or a patch.
- Push it gently through the barrel, do not force it. Work toward the muzzle where possible.
- Do this dry, or with a tiny amount of silicone oil on the patch. Never use harsh solvents or petroleum-based oil.
- Repeat with a fresh patch until it comes out clean.
How often? A good rule of thumb is after a day of play, or whenever your grouping gets worse. A clean barrel is one of the cheapest ways to shoot better.
Hop-up: the basics
The hop-up puts backspin on your BB so it flies further and flatter. You do not need to go deep here, but a few things help:
- Adjust it with the BB weight you actually use. Change weight and you need to re-adjust.
- With too much hop (BBs curving upward) dial it back a touch; with too little (BBs dropping fast) add some.
- Test at a safe distance and find the setting where the BB flies as flat as possible without lifting upward.
Which BB weight works best depends on your setup. For that, read our which BBs to buy guide.
Do not let the gearbox run dry
The gearbox is the mechanical heart of your AEG. You do not need to open it yourself, but you can prevent wear:
- Never fire long bursts on full auto with an empty or nearly empty battery. Too little voltage makes the motor labour and stresses the gears.
- Do not store your AEG under spring tension for months. Many players relax the spring after play by firing on semi (no BBs, in a safe direction) until the sound gets lighter.
- Hear grinding, clicking or a hiccup? Stop firing. Pushing on can turn a small issue into a big one.
Internal lubrication and shimming can go wrong if you rarely do it. If in doubt, leave it to someone with experience.
Use quality BBs
Cheap or poor BBs are a common cause of problems. They can have imperfections or seams, shatter inside the gearbox and damage your barrel.
- Choose smooth, polished BBs with no visible seams or dents.
- Match the weight to your setup and hop-up.
- Store them dry and sealed; moisture and dirt do not belong in there.
In our price comparison you will find BBs in various weights with prices from multiple shops side by side.
Battery and storage
How you treat your battery determines how long it lasts and, with LiPos, how safe it is. The main rules:
- Do not store a LiPo full or empty, but around a storage level (roughly half charged) when you will not use it for a while.
- Never charge a swollen, damaged or hot battery and use a suitable charger.
- Keep batteries in a cool, dry place, ideally in a fire-safe bag.
For the full explanation, read using LiPo batteries safely. Store the AEG itself dry and dust-free too; moisture is the enemy of metal and electronics.
When should you see a tech?
A lot of maintenance you can do yourself, but some things are better left to a gearbox technician:
- Persistent hiccups, strange noises or a sudden drop in FPS.
- Upgrades like a different spring, motor or MOSFET.
- Anything that needs the gearbox open when you are not sure what you are doing.
A good tech often prevents bigger damage and saves you money in the long run. New to the sport? Also read airsoft for beginners and use our fields guide to find a field near you, for example in Gelderland or North Brabant, to meet experienced players.
In short: keep your barrel clean, set your hop-up properly, never let the gearbox labour on an empty battery, use decent BBs and store your battery sensibly. Do that, and your AEG stays reliable for years.