The best online gun building game returns with new weapons for you to build. Two different modes to play and now with an import/export feature to allow you to share your creations. Design and shoot your very own guns in this super fun gun game sequel. How to play: Tap or click and drag to build guns Play Gun Builder 2 on Dob5.com. Gun Builder 2 is an online HTML5 game. You can play the game on smartphone and tablet (iPhone, iPad, Samsung, Android devices and windows iPhone).