The Evike crew test the limits of the Mod 40 grenade shell by attaching multiple 35mm barrel extensions. They aim to find out how adding these pieces affects the performance, power, and accuracy of different projectiles, including split BB holders and foam balls. To keep things from becoming a safety hazard, they share an important tip for beginners: always fill the shell with gas before adding any projectiles.

The experiment starts simply with just two extensions, but the team quickly escalates the project by adding ten and then twenty segments. As the barrel grows, the team observes that the BB groupings become tighter and more accurate, though managing the increasingly long device begins to require teamwork just to keep it steady. They even set a milestone for their viewers, promising a special challenge if their video hits a specific view count in a month.

The trial culminates in a massive configuration utilizing fifty extensions, creating a launcher that stands taller than a six-foot person. While the extreme length presents some practical challenges, including projectiles occasionally getting stuck or slowing down, the team successfully tests the massive setup with both BBs and multiple foam balls. They wrap up the experiment by asking their audience for feedback on how many extensions they thought would work.