A dedicated model for this purpose could easily run locally. Recognizing shapes is not exactly cutting age AI. The input to the detector could be not the G cod

A dedicated model for this purpose could easily run locally. Recognizing shapes is not exactly cutting age AI. The input to the detector could be not the G code instructions, but a 3D model representation recovered by simulating the G code. (That's a thing that exists.) The requirements for a 3D printer which detects weapon shapes is actually fairly realistic. It would likely have laughable false positives: 8-year-old Johnny not being able to 3D print a squirt pistol. Some common tools have pistol-like form factors: spray guns, glue/grease/caulking guns, drills, hair dryers. It is a cockamamie idea; but to claim that it is not doable seems a bit disingenuous.