Here's a project of Kirby Downey, creating a Battlefield 4 Rorsch X1 Airsoft Gun with 3D Printing. You may wonder why the colours are bright, perhaps due to the VCRA as it is illegal for an individual to manufacture Realistic Imitation Firearms (RIFs) in the UK. It becomes legal when it's 51% brightly coloured and called an IF (Imitation Firearm)... "The Rorsch X1 is a Rail gun from the game Battlefield 4. I have taken this weapon and added airsoft components to it, making it a working airsoft weapon which anyone can use. The files are available for free Download.

The components used where from the G&G Armaments CM16 Raider. The gun is designed to be easily snapped together with Klik joins to make it easy to access the necessary parts when needed. The model fits a standard version 2 gearbox."

Download the plans here if you want to build one.