RA-Tech NPAS Kit for Tokyo Marui and WE Open Bolt Systems

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Usually Ships: From Our Warehouse Within 24 Hours
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A CNC'd stainless steel device that lets you adjust the FPS of your WE open bolt rifle.

A perfect addition to your WE GBBR if you need to adjust your velocity depending on which site you're playing at.  Simply fit the NPAS, adjust the allen head screw with the provided tool and you're done.  Constructed from stainless steel so you don't need to worry about corrosion.  Perfect!

It'll also help bring your rifle down to a sensible fps if you're running Co2 magazines! 

Weight (Kg) 0.0500
Manufacturer RA Tech
RA-Tech NPAS Kit for Tokyo Marui and WE Open Bolt Systems
Very nice product
Review by
Quick delivery!
Quality seems very good (haven't tested it enough to know for sure). It might seem a little pricey for such a small item, but I think it's worth it, because it's probably the best and easiest way to downgrade your GBB. Install was pretty easy, but you might need some tutorials on how to disassemble the bolt. It also took a bit of skill to put back together (that's mostly WE's "fault").

Overall, I'm a happy customer :)
RA-Tech NPAS Kit for Tokyo Marui and WE Open Bolt Systems
Great little item
Review by
Arrived quicker than "The Flash"
Item is solid and for installing not to hard for person with little experience :) very happy overall and will buy From Airsoft-world plenty in the future
Important Information


All images, product contents and specifications listed are based on checks performed when a product is first listed and may differ due to changes over time made by the manufacturer. This includes package contents in regards to any 'extras' provided e.g. Sample BBs.

Items used in images to promote the main item (Holsters, Camo, etc) are not supplied unless listed in the Specification tab under 'Extras'. This includes attached rails, grips, scopes, suppressors etc.

Chinese supplied Batteries and Chargers are warrantied to be not DOA (Dead on Arrival) only. We always recommend swapping out to a better quality Battery and Charger at the earliest opportunity.

Custom Painted products (Two-Tone) are non-refundable as these are painted to order. 

Unless otherwise stated, all products are sold singly.



Any figures used are based on tests performed on the products when they are first listed. These can vary due to changes by the manufacturer, gas pressure, gas used and a number of other factors. All figures should be treated as an approximate guide and used for reference only. 

All listed FPS are +/- 5% due to differences from rifle to rifle. If you require a guaranteed FPS, please add an upgrade/downgrade option on to your product (this may cost extra).

No airsoft AEG is warrantied for use with an 11.1v LiPo or higher voltage battery at UK velocities (373fps or lower) unless specifically recommended on the product itself. Use of higher voltage batteries can cause failures and will negate any warranty implied or otherwise.



We cannot offer an exchange on pyrotechnic devices due to device failure. We are unable to guarantee that the pyrotechnic device has been stored in a moisture free environment or used correctly in accordance with the manufacturers guidelines.

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