RA-TECH NPAS adjustment key tool.
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RA-TECH NPAS Adjustment Key for WA, Inokatsu & WE GBB Systems

Take complete control over your Gas Blowback (GBB) rifle's velocity. The genuine RA-TECH NPAS Adjustment Key is an essential tool designed for regulating and fine-tuning Negative Pressure Adjustment Systems (NPAS). Whether you need to drop your FPS to meet strict indoor CQB limits or boost it for outdoor long-range skirmishes, this tool allows for precise, hassle-free valve adjustments without requiring a complete teardown of your rifle.

  • Universal NPAS Compatibility: Engineered to fit perfectly with Western Arms (WA), Inokatsu (INO), and WE-Tech NPAS nozzle systems.
  • Precision FPS Regulation: Quickly increase or decrease your airsoft gun's velocity and gas efficiency to adapt to changing weather conditions or field regulations.
  • Durable Construction: Built from high-tensile steel to resist rounding or stripping the internal adjustment valve.
  • Compact & Portable: A must-have addition to any airsoft tech kit or gameday tool pouch for on-the-fly adjustments.

8.99 € Tax included

7.25 Tax excluded

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local_shipping FREE delivery to Estonian Parcel terminal from50€ (Omniva or DPD). Details

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Return policy
14-day return option after receiving the goods

The Essential Tool for Every GBB Airsoft Operator

Gas blowback rifles are highly susceptible to temperature fluctuations, meaning your rifle might shoot field-legal in the morning but overshoot limits as the afternoon warms up. The RA-TECH NPAS Adjustment Key gives you the power to adapt instantly. Instead of swapping out nozzles or valves entirely, this specialized wrench inserts directly into your loading nozzle to turn the internal NPAS screw, giving you micro-adjustability over your rifle's power output (FPS/Joules).

Engineered for Precision and Longevity

Adjusting an internal NPAS valve requires a tool that fits perfectly to avoid stripping the delicate internal components. RA-TECH, the industry leader in GBB upgrade parts, has manufactured this key to exact tolerances. Made from robust, wear-resistant metal, it locks securely into the adjustment mechanism of your nozzle, allowing you to make confident adjustments without slipping.

Save Time on the Field and in the Workshop

No one wants to spend game day tearing down their rifle at the tech table. Depending on your specific GBB platform setup, this long-reach adjustment key often allows you to adjust the NPAS through the ejection port or breach face, getting your rifle perfectly dialed into field limits in less than a minute. It is a vital upgrade companion for anyone running aftermarket RA-Tech bolt carriers or NPAS-equipped stock nozzles.

Technical Specifications

  • Product Type: Airsoft GBB Tech Tool
  • Brand: RA-TECH
  • Function: Velocity / FPS Regulation (Negative Pressure Adjustment System)
  • Compatibility: Western Arms (WA), Inokatsu (INO), WE-Tech GBB NPAS Systems
  • Material: High-strength hardened steel/alloy
  • Application: Safe for gas blowback rifles and pistols utilizing standard NPAS nozzles
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1. Orders & Shipping

What are the shipping methods?

We ship across Estonia using Omniva and DPD parcel terminals. You can also choose to pick up your order personally from our Tallinn store.

How fast will I receive my order?

In-stock products are usually dispatched within 1–2 business days. For items marked "On order" or "Tellimisel," delivery may take up to 15 business days.

Do you ship internationally?

Yes, we ship across Europe. To see the exact shipping cost, please enter your address during checkout or contact us directly.

3. Returns & Claims

Can I return a product if it doesn't fit?

Yes, a 14-day return right applies to products purchased from the online store. The product must be unused, in its original packaging, and with tags attached. Underwear and hygiene products cannot be returned.

Items purchased from the physical store cannot be returned for a refund; however, we can exchange them for a gift card or another product. Used products cannot be returned.

How do I return a product?

Please contact us at info@milshed.com to arrange the return method. In Estonia, returns via parcel terminal are usually free.

What happens if a product breaks?

Private individuals have a 2-year right to file a claim. If a defect appears within the first 6 months, it is assumed it existed at the time of purchase (manufacturing defect).