SKU: 11440202587

CRIMSON NPAS - VFC Spec

Sale price$9.00 Regular price$10.00
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Description

CRIMSON NPAS - VFC SpecSave 1. 50 off a CRIMSON Patch when purchased together! Our 1j focused NPAS for a huge amount of VFC replicas is finally here! We've found from testing in a variety of VFCs that shot to shot consistency greatly improves when the CRIMSON NPAS is set to around 1j (More details below!). The full list of compatible VFC APFG Maruyama replicas the CRIMSON works with is below: VFC URGI GBBR (all variants) VFC 416 GBBR (all variants) VFC BCM GBBR (all

Save £1.50 off a CRIMSON Patch when purchased together!

Our 1j-focused NPAS for a huge amount of VFC replicas is finally here!

We've found from testing in a variety of VFCs that shot-to-shot consistency greatly improves when the CRIMSON NPAS is set to around 1j (More details below!).

The full list of compatible VFC / APFG / Maruyama replicas the CRIMSON works with is below:

  • VFC URGI GBBR (all variants)
  • VFC 416 GBBR (all variants)
  • VFC BCM GBBR (all variants)
  • VFC SR-16 GBBR (all variants)
  • VFC AK GBBR (all variants)
  • VFC KS-1 GBBR
  • VFC 727 GBBR
  • VFC M933 GBBR
  • VFC M733 GBBR
  • VFC M16A1 / M16A2 GBBR
  • VFC XM177E2 GBBR
  • VFC MP7 GBBR
  • VFC SR25 / M110 GBBR
  • VFC SCAR-H GBBR (all variants)
  • VFC 417/G28 GBBR
  • VFC PSG1 GBBR
  • VFC T91 GBBR (all variants)
  • VFC G36 GBBR (all variants)
  • VFC G3 / HK553 GBBR
  • VFC FAL / OSW GBBR - Install guide here!
  • VFC FNC GBBR (all variants)
  • VFC UMP45 / UMP9 GBBR
  • VFC PPSH GBBR
  • APFG MCX GBBR (all variants)
  • APFG MPX GBBR (all variants) - Install guide here!
  • Maruyama ISO 556 GBBR
  • Maruyama APC9 / SCW9 / SPC9 GBBR (all variants)
  • Marksman K1A GBBR

From CRIMSON:

Any power you could need without sacrificing any consistency

In collaboration with Waldo Dynamics, I am very excited to showcase our new and unique to the market VFC NPAS!

What makes the Crimson NPAS standout from the others on the market?

Let's cut to the chase, what makes this NPAS different from the rest? Especially if you already have one....

Our design incorporates a tighter internal bore which allows for far more consistent FPS results at the 0.9 - 1.2 joule range, making it ideal for anyone operating within those limits. A graph has been made, by the great guys at FireSupport, at the end of our product photos to demonstrate this against the stock valve. This clearly shows just how consistent then Crimson NPAS truly is. A game changer for such a small cost.

Also, don't worry; Just because the bore of the NPAS itself is narrower doesn't mean you can't also achieve higher energy outputs (we have seen past 2 joules on standard barrel lengths with 0.36g BBs). We are also testing reports that it is making people's GBBRs more gas efficient (so far it seems to be true from our tests).

The Basics:

An NPAS allows you to tune your GBBR to your desired FPS/Joule output easily and seamlessly in the field using a simple 1.5mm hex key (found in most hex key tool sets). Once installed (which is demonstrated here on our own very clear video), simply remove your bolt from your GBBR, adjust through the front of the nozzle with a hex key (Clockwise for less energy output, counter-clockwise for more), reassemble and test your results.

This is perfect for players looking to be under limits no matter the time of year, BB weight, or with gas/pressure used. It really is a "must-have" component.

The material used is a stronger Nylon Polymer in the iconic Crimson red, making it extremely easy to identify on your tech bench as well as when it is installed. You will not lose track of who's VFC NPAS is who's (not that you will need any others after this!).

Installing an NPAS will require some teching knowledge and a small amount of tools. Be careful when adjusting your NPAS to ensure you don't totally unscrew the adjustment screw, this goes for any NPAS on the market.

Crimson, it's red

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 11440202587

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Goleta
Bozeman, US
★★★★★ 5
Quality product
Seeing as it passed the smog test without any issues, it seems this product worked exactly as intended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
M
Verified Purchase
Melodie G Cross
Houston, US
★★★★★ 5
So far so good
It seems to be working well, so far. The check engine light turned off and the my vehicle seems to be running well. Be sure to follow the instructions. A while back, I wasted some money on a different catalytic converter cleaner because I put the cleaner in on a full tank of gas. It's best to wait until you're at a half tank or less of gasoline before you put in your catalytic converter cleaner. Also, I drove around right after I put in the catalytic converter cleaner and before I filled up my tank again. A couple of days later, I went to the gas station and topped off my tank. Again, it seems to be running well for now.
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Reviewed in the United States on April 21, 2026
C
Verified Purchase
ckanchola
Birmingham, US
★★★★★ 4
Works ok for some stuff.
I tried this mainly to clean my cats. It sadly didn't work for that at all. It did however work great as a basic fuel system cleaner. It smoothed out my idle and cleaned my O2 sensors they were a bit lazy before using this product now they switch fast like they are supposed too. In terms of my recommendation I say use as a fuel system cleaner. Or if your cats aren't too clogged in my case I bought an old neglected used car that likely had that problem for years. So I don't think any pour in tank cleaner would work in my case. However if your car just started having cat issues. This might work?? I think it's worth a try at least and isn't much more expensive than a basic fuel system cleaner so why not?
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Reviewed in the United States on May 16, 2026
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Verified Purchase
Mary C. Lucking
Battle Creek, US
★★★★★ 5
PASSED MY INSPECTION! THIS PRODUCT WORKS LIKE A MIRACLE DONT HESITATE TO BUY IT!
Inspection on my car due the end of January! My check engine light was coming on so I checked with a code reader & found it was a P0420. Read about the Catalytic Converter System possibly being in need of replacement or perhaps clogged. I am a woman, and know next to ZERO about cars, but I can read. Did investigate and found that the replacement of a Catalytic Converter system is mad expensive- also found this Moly Cleaner to add to gas tank. I'm not going to lie; I was nervous as I have a Kia Rio 2014 that has a very small gas tank and gets great gas mileage. In reading the consensus seemed to be to add to 1/4 tank of gas and drive fast for good periods of time to blow out the clog (if it was a clog). Did I mention I live in NYC and driving for long periods of time at high speeds can be a problem because of terrible traffic. Anyhow, this Saturday I poured the can into my 1/2 filled tank and hit a parkway near my home early morning. I did drive for 45 miles sometimes at 80mph then 60mph but tried to do it for a good few minutes at a time without getting pulled over. Checked my reader again, and it was not quite ready but the engine light did stay off. Next day, drove to work, stuck in traffic somewhat & never made it over 20mph & checked my reader again- all good to go for inspection. Went last night- my car PASSED and got that sticker in my window- so I am good for another year. The BEST money I have spent all year. Thank you for carrying this product! Saved me thousands! DONT HESITATE TO USE THIS. The hardest part for me was removing the cap on the can!
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Reviewed in the United States on January 13, 2026
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Verified Purchase
CLEVEinCR
Cuba, US
★★★★★ 5
Great stuff
Seemed to work as well as or better than some more expensive catalytic converter cleaners. I put it in while at 1/3 tank and my Check Engine light went out almost immediately once I started driving. My Tundra has almost 230,000 miles and still runs great but was getting a little harder to start after I switched from full synthetic oil to conventional. I’ll never do that again and immediately switched back but the damage was done. Check engine light came on and I had to crank longer to get it started. Adding this Liquid Moly fixed both issues temporarily. I have to wonder if this was used regularly, say every 3 months, if it would clean the catalytic converter more permanently?
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Reviewed in the United States on December 29, 2025

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