fancy 1 of these in your garage

[barrym381]

http://www.youtube.com/watch?v=8aghzpO_UZE   

[Agreeable Slick]

Nope, because you can't make anything of substance with them.

Put a reasonable amount of torque through it and it will shatter. Until they can 3D print with carbon fibre of similar it will just be a nice way of representing things.

[Jack3559]

I don't know how much torque a .22 bullet puts out but it handles it pretty well:

http://youtu.be/JK55GSbSWQ0

I've been using a 3D printer to print pickup bobbins for a while now and they've never shattered on me.

I think they'd bend before they broke, but maybe that's down to the resin.

[Agreeable Slick]

Torque and impact are two completely different forces. In that video for example it is fired once. Now try to run a entire clip through it and see what happens.

To highlight my point of just how fragile 3D printing is there is a video involving guns (ooooo exciting) here: http://www.youtube.com/watch?v=DconsfGsXyA

Bear in mind there is no direct impact here on the structure of the gun, it is only the lower mechanism that houses a simple trigger pivot that repeatedly breaks.

There is another video somewhere around that shows printing with Ally and Ti. Now that is much more interesting in terms of possibilities.

[VW BUSH]

Even the the Ali and Ti stuff is not that durable, its all only good for representation of what you want.
3D printing is good for making casting paterns or cheap one off moulds for resin or the like.
We got one here at work.

[gazareth]

so darn creepy that machine.

[clipperjay]

Jeez China has been doing this for years 

[Sam]

Ti dropouts on Charge bikes are pretty cool, video here http://www.bikeradar.com/news/article/video-3d-titanium-printing-of-bicycle-components-37404/