The youtuber Mark Rober Manufactured the Largest Nerf gun able to throws firing projectiles. He used as a model the gun Nerf Maverick REV-6 with a 6 shot barrel. For His project, He Was assisted by two other youtubers Ryan and David from the YouTube channel electrical Engineering. They used a bottle of paintball compressed air to shoot 20 shots. The projectile, a foam with a form of tube with a suction cup, gets out of the gun at the speed of 64 km / h ! With a more aerodynamic projectile, They succeed to send over 120 meters. Amazing !