Restore power and consistency to your spring-piston air rifle. This precision replacement compression (mains) spring is built for reliability — made from high-grade spring steel and heat-treated for long service life. It’s a direct, cost-effective way to bring a tired powerplant back to life or to fit during routine servicing and tune-ups.
Why fit a new mainspring?
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Regain lost power: springs fatigue over time. A fresh spring restores muzzle energy and tighter velocity spread.
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Better shot-to-shot consistency: renews consistent compression and improves group repeatability.
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Cost-effective repair: replacing the spring is far cheaper than replacing the entire power assembly or buying a new rifle.
Product features
- Manufactured from high-tensile spring steel and heat treated for resilience
- Precision wound for even coil spacing and smooth compression
- Corrosion-resistant finish (where specified) for longer life
- Suitable for spring-piston air rifles — not for gas-ram (nitro) or PCP systems
Key specifications
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Type: Compression / mainspring for spring-piston air rifles
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Free length: ±132 mm (approx.)
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Outer diameter (approx.): ±19 mm (approx.)
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Material: High-grade spring steel (heat treated)
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Finish: Natural steel or anti-corrosion coating (varies by batch)
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Note: exact wire diameter and rate vary by part — confirm fitment to your rifle model before ordering
Fitment & compatibility
This spring is intended as a replacement for conventional spring-piston air rifles. It is not suitable for PCP or gas-ram systems. Before ordering, match the new spring’s free length and outer diameter with your original spring or provide your rifle make & model so we can confirm compatibility.
Installation & safety notes
Important — caution required. Replacing a mainspring stores and releases significant mechanical energy. Incorrect removal or fitting can cause injury or damage. If you are not experienced with air-rifle disassembly, we strongly recommend using a qualified gunsmith or technician.
- Use a proper spring compressor or follow the manufacturer’s service procedure to relieve tension safely.
- Inspect piston, spring guide, seals and other internals while you have the rifle open; replace worn parts together for best results.
- Use correct lubricants and follow a gentle break-in procedure for new springs to avoid premature wear.
- After installation, function-test the rifle carefully and verify safety, accuracy and point-of-impact before normal use.
What’s in the box
- 1 × Air rifle compression (mains) spring — size as ordered (±132 mm × ±19 mm)
- Quick fitment notes / basic guidance
Frequently asked questions
How do I confirm this spring fits my rifle?
Compare your old spring’s free length and outer diameter to the figures above. If you don’t have the original spring, send us your rifle make & model and we’ll advise the common spring sizes used for that platform.
Can I uprate my rifle by fitting a stronger spring?
Yes — a stiffer spring raises power but increases cocking effort and internal stress. Uprating often requires complementary upgrades (stronger spring guide, different piston head, better lubrication). Also observe local laws on muzzle energy limits.
Is this suitable for gas-ram or PCP rifles?
No. This spring is only for conventional spring-piston systems. Don’t fit a steel mainspring to gas-ram or PCP assemblies.
Legal & safety reminder
Modifying air-weapons may be subject to local laws and regulations. Ensure you comply with South African firearm and air-weapons legislation before performing modifications. When in doubt, seek professional installation.
Need exact matching or a model-specific recommendation? Send the rifle make, model and any original spring measurements and we’ll match the correct part and provide an SKU-ready product page for you.
