Is that an air rifle? I made one myself using $15 of hardware store stuff... But I think my rifle (I used a M6x30 iron bolt as a projectile) would have knocked that battery off where it was standing. I shot a hole in thin aluminum roof sheeting, 4mm plywood, through several cardboard boxes, and at brick walls.
Cool LiPo fire, next time save the connectors!
Here's the "bullet" lodged in the 4mm plywood sheet. This shot didn't go through, but a few others did.