This kid should be red flagged. He is obviously a threat to himself and others. Oh… the humanity of it all!!! 
Good for him. He is lucky to have LEGO available.
In 1970’s we had pencils and rubber bands only 
… gun was not such sophisticated, but made the same result 
WOW!!! that’s Entirely AWESOME!!!
… and 3D printing wasn’t even needed … just sayin’
Way Way Cool.
Now what I really really want is a Lego AR!!!
What? No bayonet lug?
Seriously, the only way to make it better would be to wrap it in bacon!
You can Google “Lego [anything]” and get a result. I am single so I tried “Lego girlfriend”…
Three things I REALLY wanted to comment on, but… I have already been banned by so many forums.
Neat toy, unfortunately in probably half the neighborhoods in the country if not more this kid would probably get swatted eventually when the neighbors see him practicing with it.