Tokyo Marui MWS Gas Blowback “Ion” Nozzle Springs

The Waldo Dynamics "Ion" Nozzle Springs are a high-performance upgrade specifically designed for the Tokyo Marui MWS ZET System, offering a significant increase in return speed and feeding reliability. By replacing the standard factory springs with these precision-engineered "Ion" variants, gas blowback operators can achieve a much snappier cycle and reduce the risk of nozzle-related jams during rapid-fire strings.

The Tokyo Marui MWS is widely considered the gold standard for GBB rifles, but its stock nozzle springs are a known weak point, especially when using higher-pressure gases. Waldo Dynamics has solved this with a bespoke spring rate that ensures the nozzle returns to its indexed position faster than ever before, keeping up with high-speed bolts and aggressive triggers.

Core Specifications & Performance

• Enhanced Spring Rate: Meticulously tuned to provide a faster return stroke without putting undue stress on the nozzle's internal components.
• Superior Material Quality: Manufactured from high-tensile spring steel that maintains its "memory" and tension over thousands of cycles, far outlasting original equipment manufacturer (OEM) parts.
• Reduced Nozzle Drag: The "Ion" springs help the nozzle snap back into the bolt carrier group more efficiently, which is critical for consistent feeding and gas efficiency.
• Direct Drop-In Fit: Engineered specifically for the MWS ZET System bolt, requiring no modifications for installation.
• Signature Waldo Aesthetics: Finished in a unique violet coating that not only looks professional but provides a layer of corrosion resistance.

The "Pro" Take

In our technical workshop, we consider the Ion Nozzle Springs a "Day One" upgrade for any MWS owner. The stock TM springs are quite soft, designed for low-pressure Japanese duster gas; when we run them on Green Gas or Propane in the UK, they can often stretch or fail to return the nozzle fast enough, causing feeding issues or "double-feeding." The Waldo Dynamics springs provide that mechanical snap that makes the MWS feel truly "surgical." It is one of the most cost-effective ways to bulletproof your RIF (Realistic Imitation Firearm) and ensure it performs reliably under pressure.

UK Spec & Site Performance

On the UK circuit, the MWS is a popular choice for its year-round reliability. However, the damp British climate and the use of high-pressure gases to combat cool-down put extra strain on the internal springs. The Ion Nozzle Springs are essential for UK players who want to maintain a high rate of fire at indoor urban venues or ensure consistent cycling during a long woodland skirmish. By improving the nozzle return, you ensure that every BB is chambered correctly, helping you stay effective and accurate within the standard UK site limits (typically 350 FPS or 1.14 Joules for gas rifles). Whether you are playing in the rain or a humid CQB bunker, these springs keep your MWS running like a dream.

Friendly FAQ

Will these springs increase my FPS?
No, nozzle springs do not directly increase muzzle velocity. Their job is to ensure the nozzle returns quickly and reliably to ensure the rifle cycles and feeds correctly.

Do I need a technician to install these?
While the MWS bolt is relatively straightforward to disassemble, it does require some basic tools and confidence with small springs. If you are unsure, our workshop team is always happy to help with a professional installation.

Are these compatible with the T8 or Guns Modify bolts?
These are designed for the standard Tokyo Marui MWS bolt system. While they may fit some aftermarket bolts that follow the original TM specification, we recommend them primarily for the OEM TM bolt carrier group.

How often should I replace my nozzle springs?
With the Waldo Dynamics Ion springs, you shouldn't need to replace them for a very long time. However, we recommend checking them for any signs of stretching or damage whenever you perform a deep clean of your MWS bolt.