This instructional video provides a step-by-step guide on installing the Shadow Line Division NPAS kit for Tokyo Marui AKM and AKX gas blowback rifles. The process begins with the detailed disassembly of the rifle’s bolt carrier and nozzle assembly, requiring basic tools like hex keys and a small screwdriver.

6mm Badger the NPAS is installed on the  APFG Spear LT and shows how... "In this video, I give an update on my APFG Spear LT, which I recently brought to Battle Lab to play with my friend Brandon. I lent it to him, but when we chrono’d it the gun was shooting around 460 FPS on 0.25 BBs — way over the field limit!

Elbee Tactical does an upgrade on his Tokyo Marui MWS Gas Blowback Rifle... "In this video, we take a deep dive into upgrading the internals of the Tokyo Marui MWS GBB rifle. I install a Guns Modify lightweight bolt carrier, drop in a BAVTAC Titanium Z-Plate, and fine-tune power using the FEDA adjustable NPAS valve.

From full disassembly to testing — you’ll see every step of the way.

Sabre Airsoft has released a video guide demonstrating how to install an NPAS (Negative Pressure Air System) on the Vorsk VMP-2 gas blowback rifle. This system allows for easy muzzle velocity adjustment, which is crucial for meeting different site regulations.

The Middle Aged Gamer shows how to install the Guns Modify MWS SCAR-L NPAS... "During my Review of the Guns Modify Scar-L MWS GBBR we discovered the FPS is on the high side for CQB games so an NPAS was needed. Due to the unique design of this MWS GBBR I made this video showing you the basics of how to do it. the principle of this video is the same regardless of what NPAs you want to use."

NextGen Retros shows how to install the Feda Valve/NPAS and Bavtac Nub made for the Tokyo Marui M4 MWS gas blowback rifle. The FEDA Valve, meaning Fast, Easy & Direct Adjustment Valve, offers a straightforward way to control power levels in your TM MWS replica. Using a simple 1.5mm Allen key (included), you can quickly fine-tune performance.

DAKKA Airsoft installs and tests the Federal Concepts FEDA Valve/NPAS designed for use with the Tokyo Marui MWS GBB System... "Tired of inconsistant readings? Is the day warming up? Need to make an adjustment? Tired of having to use specific tools? Well, Federal Concepts has you covered with their FEDA Valve/ NPAS!

This my first review style video, I took as much time as I could to make sure the details were as accurate as possible.

Ice K tries the Begadi NPAS if they can fit the SIG M17 and M18 GBB pistols made by VFC. The Begadi NPAS (Negative Pressure Adjustment System) is designed to decrease energy in GBB weapons, thereby enhancing gas efficiency and reducing cooldown susceptibility. It comprises a two-piece stainless steel valve, PTFE discs for adjusting energy, and a CNC-manufactured 7075 aluminum backplate.

According to the Kyaneko Brothers, they tried using a Tokyo Marui MK18 Mod.1 MWS GBB that has the RA Tech NPAS Ki and he reports that it's crazy, which we take it to be a very positive outcome. Mainly available from the Airsoft Taiwan store, the NPAS Kit, allows one to adjut the FPS of the MWS GBB to meet site limits. This two-part loading nozzle fits most Marui GBBs with the MWS system.

Ollie Talks Airsoft shows how you can install the NPAS on the VFC M110... "So this video is for installing an NPAS into an M110 replica Airsoft M110 by VFC, its not my replica and the owner had requested the new part be fitted so I figured why not show anyone whose interested inside the bolt. The more you know!

Thanks to my friend Tom for his help in making this video possible and also the owner of the M110!"