Nerf gun battles are as much a part of startup culture as putting stickers on your MacBook, crashing in the office after a hard night’s coding, and overusing the word “disrupt.” Well, if you get hold ...

Nerf’s Rival blasters, which can fire small foam balls at speeds of up to 70 miles per hour, already make you a formidable opponent when office battles erupt. But it wasn’t enough for YouTube’s ...