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DangerWerx FPS Reduction CQB-R Valve for KWA LM4 Airsoft Gas Blowback Series Rifles

ID: 48313 (Valve-DW-CQBR)
3.7 stars, based on 3 reviews
DangerWerx FPS Reduction CQB-R Valve for KWA LM4 Airsoft Gas Blowback Series Rifles
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This item is currently Out of Stock Usually restocked within 1-3 weeks.
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Developed on the idea of early valve timing, the CQB Valve is designed to lower the FPS of your KWA NS2 pistol or SMG to a CQB field limit.


  • CNC 6061 aluminum construction
  • Easy to install
  • Installs directly into the blowback unit so only one valve is needed per gun
  • Non-permanent, can be easily switched out to full fps valve
  • Made in the USA
Application: Reduces FPS by 20~40 FPS allowing your high power KWA GBR to be CQB / Indoor legal.
Process: CNC Aluminum.
Manufacture: DangerWerx

Disclaimer: DangerWerx or is not responsible for improper installations or damages faced from installation of CQB Valve. The DangerWerx CQB Valve is intended for the KWA or KSC System7 MP9, MP9r, MP7, M9PTP and M9TACPTP Models and is sold for aftermarket use only. The product is not intended to imply that this part is designed, manufactured, or endorsed by KWA Performance Industries, Inc or KSC. The installation of any aftermarket part may void or otherwise adversely affect your factory warranty. It is the sole and exclusive responsibility of the purchaser and user to determine the suitability of the product for his or her use. The user shall assume all legal, personal injury risk, and liability and all other obligations, duties and risks associated therewith.

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3 Customer Reviews

(Write a review)

by John C. on 06/05/2016
"Awesome product!! As a "drop in" it does exactly what it says, It took my mkm lm4 from 390-410 fps gun (with mods) to a 345-355 fps gun (using propane gas)

However I'm trying to squeeze out a little more fps by slightly shaving down the base of the nozzle in hopes to get me to a steady fps of 380-390 (my field is a max fps of 400) so let the work begin!!!

Pros: It works!
It does what it says in description!
It's not adjustable!!!
(Unless you modify it)

FYI: you might wanna pick up a KSC jet spring to go with this part the stock spring is a little on the weak side hope this helps:)
by Jacob H. on 01/29/2015
"Disregard my previous, I meant it dropped to 325 rather than around 340-350 which would have been just a bit better.
by Konrad K. on 11/18/2014
"Drops too much of the fps? Shave it on the flat end and replace your valve spring with a stronger one. I've installed it in my Kriss Vector and it droped the fps to 290. After shaving it and replacing the spring it went up to 340 fps.

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This item is currently Out of Stock. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.