Nerf Sledgefire Shells

This is a remix of xcnerd88's sledgefire shell. The barrels have been adjusted for a tighter dart fit, and the shell is tapered at the front for easier insertion. I have also added bars at the back to prevent pushing the darts too far back. These are the best sledgefire shells I have personally tested.

Barrels tightened, front tapered, and dart blockers added.