The SilencerCo Maxim 9 is an integrally suppressed 9mm handgun that operates on a proprietary delayed blowback system. They call it a delayed wing system, similar to a roller delayed system. (Part 90 is the wing)

At the time of the Maxim Vice debut, the initial Maxim 9 prototypes were built on a highly modified Smith & Wesson M&P frame and slide. The final version now features a proprietary frame and slide, but utilizes Glock magazines. The pistol also sports an optics plate for micro red dot mounting options.

Forgotten Weapons video: [6:32] https://youtu.be/j2Fbaz3T7Rc?si=

TFBtv video: [16:10] https://youtu.be/q_vOF1lFhvQ?si=

The TFB video provides more coverage the FW one is a first impressions at ShotShow.