CYMA Replacement Cylinder for SR-25 QBS Airsoft AEG Rifles (Model: Not Ported)

CYMA Replacement Cylinder (Not Ported) for SR-25 QBS Airsoft AEG Rifles

Restore maximum air volume and factory compression performance with the CYMA Replacement Cylinder (Not Ported) for SR-25 QBS Airsoft AEG rifles. Designed as a direct OEM replacement, this full, non-ported cylinder is built specifically for SR-25 QBS platforms that require extended gearbox components and precise internal fitment.

If you’re rebuilding your compression system, upgrading for a longer inner barrel, or replacing a worn factory unit, this cylinder delivers reliable performance with minimal installation hassle.

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🔧 Quick Specs

• Model: Not Ported (Full Cylinder)

• Compatibility: SR-25 QBS Airsoft AEG Rifles

• Material: Durable aluminum alloy

• Design: Drop-in OEM replacement

• Manufacturer: CYMA

• Application: Compression system rebuild / restoration

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Engineered for SR-25 QBS Platforms

SR-25 rifles operate on extended Version 2-style gearboxes that require specific internal dimensions to maintain proper air compression. The QBS (Quick Buffer System) configuration simplifies spring access, but correct cylinder sizing remains critical to consistent FPS and efficient cycling.

This non-ported cylinder is engineered to meet SR-25 QBS specifications, ensuring:

• Proper air volume for extended barrels

• Balanced compression for DMR builds

• Stable semi-auto cycling

• Reliable shot-to-shot consistency

Because it matches factory tolerances, it integrates seamlessly with stock SR-25 QBS piston heads, cylinder heads, and gearbox shells.

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Full (Non-Ported) Design for Maximum Air Volume

Unlike ported cylinders that vent air at specific points in the compression cycle, this non-ported full cylinder retains maximum air capacity throughout the entire piston stroke.

Benefits of a full cylinder include:

• Increased air volume for long inner barrels

• Improved efficiency with heavier BB weights

• Stronger air push for higher spring builds

• Better performance in DMR-focused configurations

For SR-25 platforms running extended barrel lengths, a full cylinder helps maintain optimal air-to-barrel volume ratio, which is crucial for achieving consistent range and accuracy.

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Durable Aluminum Alloy Construction

Constructed from high-quality aluminum alloy, this CYMA cylinder balances strength and weight for dependable internal performance.

Aluminum alloy provides:

• Excellent durability under spring tension

• Resistance to wear and internal scoring

• Smooth compression surface

• Lightweight cycling characteristics

• Corrosion resistance

The precision-machined interior helps maintain proper air seal with your piston head O-ring, reducing friction while supporting consistent compression output.

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OEM Factory Direct Replacement

As a genuine part from CYMA, this cylinder is manufactured to original equipment specifications. That means you’re not guessing about fitment or dimensional accuracy.

OEM advantages include:

• Proper gearbox alignment

• Reliable compatibility with stock internals

• Factory-level performance restoration

• Simplified maintenance and rebuilds

If your original cylinder is scratched, worn, or experiencing compression loss, replacing it with an OEM-spec component is one of the most effective ways to restore performance.

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Drop-In Design – Minimal Modifications Required

This CYMA SR-25 QBS cylinder is built as a drop-in replacement, requiring little to no modification for installation in compatible gearboxes.

Ideal for:

• Routine maintenance

• Compression system overhauls

• Repairing air seal inconsistencies

• Gearbox rebuild projects

• Preventative internal servicing

While installation is straightforward for experienced airsoft technicians, professional installation is recommended for those unfamiliar with gearbox disassembly.

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Ideal For

This non-ported cylinder is best suited for:

• SR-25 QBS rifles with longer inner barrels

• DMR airsoft builds

• High-efficiency compression setups

• Full rebuilds requiring maximum air volume

• Replacing worn or damaged factory cylinders

If your SR-25 is experiencing inconsistent FPS, reduced range, or compression loss, upgrading to a fresh full cylinder can significantly improve overall performance.

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Why Choose the CYMA SR-25 QBS Non-Ported Cylinder?

✔ Designed specifically for SR-25 QBS AEG platforms
✔ Full cylinder for maximum air volume
✔ Durable aluminum alloy construction
✔ OEM factory-direct reliability
✔ Drop-in installation with minimal modification
✔ Ideal for DMR and long-barrel builds

When maintaining or upgrading your SR-25 QBS rifle, precision matters. The CYMA Replacement Cylinder (Not Ported) ensures your compression system delivers consistent air output, reliable cycling, and dependable long-term durability.

Keep your DMR platform operating at peak performance with the right internal foundation.