Build your own guns. 1- Build & Fully Customise. 2- Create Animations: Reload, Pump-action, Bolt-action, Recoil. 3- Customise Sounds: Fire, Mag-in, Mag-out, Cocking. 4- Customize skin: Camouflage, Painting. Gun Building 3 let you create your own weapon in 3D, all the way down the inner parts. Take your gun to the FPS game and modify your weapons. Huge selection of parts and attachments. Various camps for many combat situation. All in realistic 3D.