Engineered from the ground up to integrate with the original nozzle, this NPAS backplate and valve set is specifically tailored for the Tokyo Marui MP7A1 GBB — widely regarded as one of the best airsoft SMGs. Precisely tune your MP7’s performance: this kit can reduce muzzle velocity by over 100 FPS, allowing you to run heavier BBs at up to 1.14 joules, depending on your gas, hop-up, and barrel configuration.

Each kit includes a dedicated installation tool to make fitting the NPAS quick and straightforward. For a step-by-step walkthrough, consult our full installation guide on the website.

Key benefits:

• Purpose-built for the Tokyo Marui MP7A1 GBB

• Adjusts output by over 100 FPS (performance will vary with gas/rubber/barrel setup)

• Enables use of heavy BBs up to ~1.14 J (dependent on your setup)

• Includes an installation tool for easy fitting

• Designed to work seamlessly with the original nozzle for reliable operation

https://youtu.be/L-ehcjvdje4

Important note: actual FPS and joule values will vary based on your gas type, barrel, and hop-up setup. Always verify your gun’s output with a chronograph and comply with local field and legal limits.

When installed the NPAS runs at around 1.1 joules with original TM spec. Heavier weights will need to be adjusted due to joules creep

There is intentional play between the NPAS valve grooves and the backplate arms as shown in video, it needs to freely snap back to place after each shot allowing the spring to do its job.