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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Thrifty Shopper
Omaha, US
★★★★★ 5
Soft and comfy
Size: 12 Plus, Color: Microfiber - Colors May Vary
Comfortable fit. Have bought 4 times.
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Reviewed in the United States on May 30, 2026
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Lynda
Lowell, US
★★★★★ 4
No elastic around the thighs is kinda nice!
Size: 9, Color: Cotton Stretch - Colors May Vary
Great undies! They fit good and the fabric is comfortable. Only thing is that the legs tend to ride up/bunch up with pants on. I got them for post surgery comfort and thats what I got.
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Reviewed in the United States on May 14, 2026
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Cissy Horn
Dallas, US
★★★★★ 5
Soooo comfortable
Size: 11 Plus, Color: Microfiber - Colors May Vary
Easy on/off because they really do stretch but return to shape. Fit is close to the body but not tight. Love that there is no elastic binding around my legs. Clothes glide over them because they are super smooth. Might never buy another style again.
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Reviewed in the United States on May 5, 2026
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BirdinKeys
Waukegan, US
★★★★★ 5
These were such a RELIEF during a shingles outbreak!
Size: 10 Plus, Color: Microfiber - Colors May Vary
I developed shingles on my abdomen and spent a few days commando because I was in so much pain and couldn’t stand anything against my skin but a nightgown. I had a drs appointment and was agonizing about showing up in a nightgown and bathrobe at the office. Then I I remembered my grandma used to wear boy leg high waisted undies so looked for something similar. These underpants by Fruit of the Loom were inexpensive and seemed to be similar to what I thought might work, so I ordered a four pack. They were very reasonably priced and when they arrived were of very good quality and well made. They were snugger fitting than I had hoped but were very very soft for tender areas on my abdomen. As it was, the snugness was comforting as they stay in place and act as a barrier between the sore rash areas and light clothing. I’ve never experienced the discomfort of nerve pain from wearing clothes andI’m so glad I happened on to these. I’m on the mend now but still wearing these as I’ve developed some neuralgia and these continue to keep me comfortable.
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Reviewed in the United States on April 29, 2024
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Bri
Belleville, US
★★★★★ 3
annoyed
Size: 8, Color: Cotton Stretch - Colors May Vary
i purchased the boxer brief. they fit perfectly. they are fairly soft and seemingly comfortable. not too thin or too thick, good for breathability. my biggest issues are the stitching being poorly done, making me worry the longevity will be lacking and the label stating “do not use fabric softener”. the reason i am annoyed though, is the images show pink and gray colors only, which is what i was hoping for, or at least colors only. i understand all multipacks are marked “colors may vary”, but for the love of god, stop putting white pairs in these packs. white, nudes/neutrals, and black should be sold separately in their own packs. i do not want ugly old timey white underwear. i wanted colors, any colors EXCEPT white! i would however, have LOVED an all black only pack!
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Reviewed in the United States on December 8, 2024

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