Fixing & Upgrading My KWA KMP9 | CQB Bolt + TNT Hop-Up Install

In this video, I take my KWA KMP9 Gas Blowback SMG and make it more CQB-friendly by fixing performance issues and installing some key upgrades.

The KMP9 is a great replica, but mine was having issues with the bolt jamming and producing a shaky noise. It was also shooting too hot (375–400 FPS) for CQB. I wanted to bring that down, improve consistency, and make it ready for indoor play.

Here’s what I cover in the video:
• Chrono testing the stock KMP9
• Full disassembly (with help from GP Airsoft’s teardown guide — check out his channel here)
• Installing the KWA CQB Bolt for reduced FPS
• Installing the TNT APS-X T-Hop Unit with upgraded barrel and hop rubber
• Reassembling and chrono testing again (~300 FPS, perfect for CQB)
• Adding extras: threaded barrel adapter, tracer unit, and a Guns Modify EOTech lens protector

The end result? A reliable, smoother shooting KMP9 tuned for CQB with tracer functionality — exactly what I was aiming for.

👉 Parts featured in this build:
• KWA KMP9: https://www.evike.com/products/33188/...
• TNT APS-X Hop-Up System: https://www.evike.com/products/24945/...
• Threaded Barrel Adapter: https://www.evike.com/products/24903/...
• KWA CQB Bolt: https://www.evike.com/products/36455/...
• Tracer Unit: https://www.evike.com/products/39143/...
• Guns Modify EOTech Lens Protector: https://www.evike.com/products/16281/...

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