Maybe, binders and sintered are cool don’t get me wrong, but for now it is gears for your window mechanism in your car door, not some high stress item. “Single Crystal” technology is sort of related, but I don’t see this being done by a laser it complicated.
The big thing to keep in mind when thinking about 3D printing is disposable. A lot of those high stress items don’t need the same durability as before because you’ll replace the item after a couple of uses. If you can 3D print something in under a day with material costs of under $50 you don’t need that something to be of durable quality. So sure the printed gun will be one you go through 2 or 3 full loads before it’s too worn and discarded, it’s OK because you printed 6 of them last week. Some work needs to be done to make that failure non-hazardous, but these things have to potential to bring the disposable lighter revolution to a lot of products.