SilencerCo announced the Maxim-9 pistol in late 2015. Having gone through some huge growth of the past few years, the company wanted to expand its capabilities and thought that the time was right for a modern integrally suppressed pistol. It was a unique new design of modern semiautomatic pistol build from the ground up to be integrally suppressed. The action is a proprietary delayed blowback system with all of the moving parts in the back half of the slide. This leaves the front of the gun dedicated entirely to suppressor volume.

The guns were released at SHOT Show 2017, and were relatively slow sellers, because of the high price and the required NFA registration. The expected passage of the Hearing Protection Act around that time would have been a huge boon for sales, but did not ultimately happen. Still, production continued until tapering off in early 2021 as SilencerCo shifted priority to regular suppressor manufacture in the face of a boom in demand.

The project may not have been a massive success for SilencerCo, but it was still a worthy endeavor that they do not regret. It helped mature the company, forcing them to embrace new proficiency in things like GD&T and advanced quality control machinery. And the pistol is, in fact, very cool.