In this guide
A well-maintained airsoft gun performs better, lasts longer and saves you money on repairs. Whether you’ve just bought your first AEG or you’ve been playing for years, regular maintenance is one of the easiest ways to keep your gear in top condition.
We’ve been servicing and upgrading airsoft guns at our Rochester workshop on the Medway City Estate in Kent since 2006. In that time, we’ve seen hundreds of guns come through our door with problems that could have been prevented with basic maintenance. This guide covers everything you need to know, from quick field care between games to more thorough home maintenance routines.
New to airsoft? Start with our beginner’s guide first.
Why Maintenance Matters
Airsoft guns are precision instruments with moving parts under mechanical stress. Without regular care:
- Accuracy degrades, Dirty barrels and worn hop-up rubbers reduce consistency
- FPS drops, Worn seals and dried lubricant reduce air compression
- Parts wear faster, Unlubricated metal-on-metal contact accelerates wear
- Reliability suffers, Grit, dirt and moisture cause jams and misfires
- Costly repairs, A £5 tube of silicone grease prevents a £60 gearbox rebuild
The good news: basic airsoft gun maintenance is simple, takes 10-15 minutes and requires minimal tools.
Essential Maintenance Kit
Before you start, gather these items. Most are available in our Tech & Upgrades section:
| Item | Purpose | Cost |
|---|---|---|
| Cleaning rod + cloth patches | Barrel cleaning | £5-10 |
| Silicone oil spray | External lubrication, O-rings | £5-8 |
| Silicone grease (100% pure) | Internal lubrication, gears, pistons | £5-10 |
| Soft cloth / microfibre | Wiping down externals | £2-3 |
| Small Allen key set | Basic disassembly | £5-8 |
| Compressed air can | Blowing out dust and debris | £5-8 |
Important: Never use WD-40, petroleum-based oils or any non-silicone lubricant on airsoft guns. Petroleum products degrade rubber seals, hop-up rubbers and O-rings.
After Every Game Day, Field Care (5 Minutes)
These steps take minimal effort but prevent the most common issues. Do them as soon as you get home from the airsoft site.
1. Remove the battery
Always remove the battery when you’re not using your gun. Leaving a LiPo connected can drain it to dangerous levels. Store LiPo batteries at storage voltage (3.7-3.8V per cell) in a LiPo-safe bag. See our battery guide for safe LiPo handling practices.
2. Clear the hop-up chamber
Fire a few shots with the magazine removed to clear any BBs from the hop-up chamber and barrel. This prevents a BB sitting against the hop-up rubber for weeks, potentially deforming it.
3. Clean the barrel
Run a cleaning rod with a slightly damp cloth patch through the barrel 3-4 times, then follow with a dry patch. This removes BB residue, dust and moisture. A clean barrel is the single biggest factor in shot consistency.
4. Wipe down externals
Use a dry microfibre cloth to remove dirt, mud and moisture from the body, stock and rails. If it was a wet game day, pay extra attention to metal parts, a light spray of silicone oil on external metal surfaces prevents surface rust.
5. Inspect for damage
Quick visual check: any cracks in the body? Loose screws? Damaged stock or rail sections? Catching small issues early prevents bigger problems.
Monthly Maintenance, Home Care (15-20 Minutes)
Once a month (or every 3-4 game days), do a more thorough service:
1. Deep barrel clean
Use a barrel cleaning rod with silicone-dampened patch, followed by 2-3 dry patches. If you notice accuracy issues, this is almost always the first fix. For stubborn residue, a few drops of isopropyl alcohol on the patch works well, just ensure the barrel is completely dry before using.
2. Check hop-up rubber
Look at the hop-up rubber through the top of the hop-up unit (remove the barrel if accessible). It should be soft and pliable with no cracks, tears or hardening. A worn hop-up rubber is the most common cause of accuracy loss. If it’s degraded, replacing it is one of the best upgrades you can make.
3. Lubricate O-rings and seals
Apply a thin layer of silicone oil to any visible O-rings (magazine fill valves on GBBs, piston head O-ring if accessible). This maintains the air seal that determines your FPS consistency.
4. Tighten screws and fittings
Vibration loosens screws over time. Check and tighten body screws, stock screws, rail screws and optic mount screws. Use the correct Allen key size, stripping screwheads makes everything harder.
5. Magazine maintenance
For hi-cap magazines: wind the wheel until fully loaded, then release tension to store. For gas magazines: keep a small amount of gas in the magazine for storage, this keeps the seals lubricated. Empty gas magazines = dry seals = leaking magazines.
Platform-Specific Maintenance
AEG (Automatic Electric Gun)
AEGs are the most common and generally the lowest-maintenance platform.
- Motor height adjustment: If you hear a whining or grinding sound, the motor height may need adjusting. The adjustment screw is at the bottom of the pistol grip. Small adjustments make a big difference, turn it in quarter-turn increments.
- Gearbox lubrication: Every 6-12 months, the gearbox benefits from being opened and re-greased. This is more advanced work, if you’re not confident, bring it to our workshop and we’ll do it for you.
- Shimming: Listen for excessive gear noise. If gears sound louder over time, they may need reshimming. This is a workshop job unless you’re experienced with gearbox internals.
GBB (Gas Blowback) Pistols & Rifles
Gas guns require more frequent maintenance than AEGs due to their gas-operated mechanisms.
- After every use: Clean the barrel, lubricate slide rails with a thin layer of silicone grease and add a few drops of silicone oil to the magazine fill valve
- Monthly: Strip the slide (field strip only, you don’t need to remove every pin), clean the nozzle and blowback housing, re-lubricate moving parts
- Magazine O-rings: These are the most common failure point on GBBs. If a magazine starts leaking gas, the O-rings usually need replacing, a £2 fix that takes 5 minutes
- Temperature awareness: GBBs perform poorly in cold weather. Green gas drops pressure below 10°C. Consider CO2 magazines for winter use.
HPA (High Pressure Air)
- After every use: Disconnect the air line and release residual pressure from the gun
- Regulator: Check output pressure regularly, drift indicates a regulator service is needed
- Tank hydrostatic test: HPA tanks have a limited life (typically 5 years) and require hydrostatic testing. Check the stamp date on your tank.
- O-rings: Keep spare air line O-rings. They wear with repeated connection/disconnection.
Bolt-Action Sniper Rifles
- Barrel cleaning is critical: Snipers rely on precision, even minor barrel fouling affects accuracy. Clean after every session.
- Cylinder O-ring: Lubricate with silicone grease every few months. A good seal is essential for consistent FPS.
- Spring: If you notice FPS dropping over time, the spring may be wearing. Spring replacement is a straightforward upgrade for most bolt-action platforms.
Storage Tips
How you store your airsoft gun between games matters as much as how you maintain it.
- Store in a gun bag or case, protects from dust, pets and accidental damage
- Cool, dry environment, avoid garages, sheds or anywhere with temperature extremes or high humidity
- Battery removed, always store LiPo batteries separately at storage voltage in a LiPo-safe bag
- Hop-up set to zero, reduces pressure on the hop-up rubber during storage
- Gun stored with barrel pointing down, prevents lubricant running into the hop-up chamber
- Gas magazines stored with a small amount of gas, keeps seals lubricated
When to Call a Professional
Some maintenance is best left to experienced technicians. Bring your gun to our Rochester workshop if you notice:
- Grinding or screeching sounds from the gearbox (gear stripping, motor issues)
- Significant FPS drop that barrel cleaning doesn’t fix (air seal problems)
- Trigger not engaging or erratic firing (trigger contact or MOSFET issues)
- Gearbox locking up mid-cycle (motor burnout, stripped gears or piston issues)
- Persistent accuracy problems after cleaning barrel and checking hop-up
- Anything involving opening the gearbox if you’re not experienced, incorrect reassembly can cause more damage than the original problem
Our technicians have been working on airsoft guns since 2006. A basic service (clean, lube, diagnostic check) starts from around £40, much cheaper than replacing damaged parts from a DIY attempt gone wrong.
Maintenance Schedule Summary
| When | Task | Time |
|---|---|---|
| After every game | Remove battery, clear chamber, clean barrel, wipe down | 5 mins |
| Monthly | Deep barrel clean, check hop-up, lube O-rings, tighten screws | 15-20 mins |
| Every 6 months | Gearbox re-grease (AEG), full strip and clean (GBB) | 45-60 mins |
| Annually | Full service or bring it to us for a professional check | Professional |
Frequently Asked Questions
Can I use WD-40 on my airsoft gun?
No. WD-40 and other petroleum-based products degrade rubber seals, hop-up rubbers and O-rings. Always use 100% silicone oil or silicone grease. This is the single most common maintenance mistake we see.
How often should I clean my barrel?
After every game day at minimum. If you’re noticing accuracy issues, clean it before your next game. A clean barrel takes 2 minutes and makes a noticeable difference.
My AEG is making a grinding noise, what should I do?
Stop using it immediately. Grinding typically indicates gear or motor problems. Continuing to fire can cause further damage. Check the motor height adjustment screw first. If that doesn’t resolve it, bring it to our workshop for a diagnostic.
How do I know when my hop-up rubber needs replacing?
Signs include: shots curving inconsistently, reduced range, BBs dribbling out of the barrel or visible cracks/hardening when you inspect the rubber. A new hop-up rubber costs £5-15 and dramatically improves accuracy.
Should I upgrade or maintain?
Maintain first. A well-maintained stock gun will outperform a poorly-maintained upgraded gun every time. Once your gun is running cleanly and consistently, then consider upgrades to take it further.
Need professional help? Our in-house technicians at our Rochester workshop handle everything from basic servicing to full gearbox rebuilds. Get in touch or drop your gun in during opening hours.
Browse our range of maintenance supplies and upgrade parts or read our complete upgrade guide to learn what to improve next.
