It's even possible to use Legos to build your own Nerf gun. Astonishing Studios, which made this gun, recommends getting a Medium Creative Brick Box to fulfill the project.

Learn how to build a LEGO pistol with this simple and fun tutorial! In this step-by-step guide, we show you how to use LEGO bricks to create a functional LEGO gun from scratch. Whether you're a ...

Can’t do that with your Lego bricks. You also can’t customize a Nerf gun like you can a K’nex gun. If you want to build a giant targeting sight on the front of your K’nex K-Force gun, you ...