Is This 'fIrst-Ever Portable Gunpowder Detector' Legit?

A startup called Solution Sensors Inc is claiming a new sensor that detects loaded guns to stop mass-shootings:

Videos below / inside:

I have a hard time believing this is useful, even if it works as claimed. From their site:

"The user points the sensor in a general area of potential targets. The sensor will give a “yes” or “no” read out, indicating that, yes, this area contains gunpowder, or no, it does not. It will then indicate the direction of the origin of the gunpowder."

and

"the device is able to identify the presence of a loaded .38 caliber pistol in a closed car trunk from about 9 feet away. " <bold emphasis in original>

This means the sensor must be pointed at a target within a range of 9 feet, probably less. In the laughably amateurish video, this is not clear, they just magically show the doors locking as gunman walk up.

A person standing 9 feet away with a sensor is nothing but a target. This product does nothing to stop the threat.

Am I being too skeptical?

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