Just looking at the photo above, you would have wished there is one built for airsoft. But even if is, you will need to build up your muscles much bigger than Arnold Schwarzenegger just to be able to carry this like the Heavy in Team Fortress 2. Just look at that white drum underslung, that's the ammo case for that monstrosity. You might as well have that vehicle mounted rather than lugging it around that before you point it towards a target, the target either already ran away, or shot you first.

Still, it's a lovingly made project for Cosplay, it is also affectionately called "Sasha" and made for big men who can carry it around. And its maker, Cory Alexander plans to do the complete "Heavy" costume together with the Minigun for the Phoenix Comicon that will take place from the 5th to the 8th of June 2014. With that Minigun, he would surely be one of the big Cosplay attractions at the event.

Alexander has painstakingly created the Minigun over three months, using a the famous 3D printer, Makerbot. This is actually works, in terms of having rotating barrels, with LED lights denoting fire instead of having some ammo.  The gun in the game itself can fire 4 rounds at the same time at the rate of 10 times per second. Just imagine that in terms of BBs, that's a lot of rounds expended quickly, making it around 40BBs per second, which should be good enough to lay down supporting fire for your time, provided that you can carry it, fully-loaded up with BBs.

If you want to try and build one for yourself, Cory Alexander has created a thread at RFP, detailing how he built the Minigun. It is image-heavy so prepare for slower page loads when following the thread. It is important to have a 3D printer as it will greatly assist you in creating the different components for the project.

You can bring it to an airsoft event for photo-op purposes, but not for skirmishing though as it will be totally useless.

However, it will be most useful at Cosplay conventions where you might attract a good number of female cosplayers dressed in their favourite comic book or anime character.

If you still intend to build one for airsoft, better be prepared to spend loads of cash as you will need to customise a perfectly working airsoft Minigun such as those from Classic Army or Craft Apple Works to fit an ammo case below. Apart from the cash, you better start building up that human body of yours to carry it on the field.