Unlike when Medabots first came out, the technology is now commonly available to build a semblance of one.
With 3d printers and such, budget and knowledge is now the only restrictions (oh and weapons).
Just a point of reference but the weapons from the film are incorrect because the ones from the Manga and anime are no longer produced by anyone.
The majors Thermoptic pistol is actually a Seburo M5 pistol and is the only know weapon to have a 3d downloadable model available.
As everyone has said, these cheep "Diode" lasers stink and produce alot of nasty fumes (leather really stinks and the smell sticks to everything) wait and save longer for one of the 40W box CO2 lasers.
They may cut craft foam but you must know that above 2W these things are "Overclocked"...