Mega Man’s Mega Buster landed in Fortnite Chapter 7 Season 4 as part of the season’s Gaming Legends crossover, and it plays exactly like the arm cannon you remember. It fires energy shots, charges up for a heavier blast, and even lets you slide across the ground. The catch is a fixed ammo pool that runs out for good.
Quick answer: Pick up the Mega Buster from floor loot or standard chests anywhere on the island, drop it into a hotbar slot, and equip it. Tap Fire for a standard shot (1 ammo), hold Fire for a charged shot (5 ammo), and use Crouch while moving to slide. It starts with 75 ammo and cannot be refilled.
Where to find the Mega Buster
The Mega Buster is a Rare weapon, and despite that rarity tier, it shows up often. You will find it lying as regular floor loot and tucked inside standard chests all across the Chapter 7 Season 4 map. The drop rate is high, so it turns up quickly around popular landing spots and busy points of interest.
Because it is so common, expect opponents to be holding one too. It is easy to grab early, but it will not carry you through a late-game fight on its own.
Controls and ammo cost
Once the Mega Buster is in a hotbar slot and equipped, you have three actions to work with. You can also press the aim-down-sights button to tighten your aim for a closer look before firing.
| Action | Input | Ammo used |
|---|---|---|
| Standard shot | Tap Fire for a quick energy blast | 1 |
| Charged shot | Hold Fire until fully charged, then release | 5 |
| Slide boost | Crouch (Left Ctrl) while moving | None |
The weapon stays usable while you sprint and slide, so you can keep pressure on an enemy while repositioning.
Making the 75-shot ammo pool last
The Mega Buster starts with 75 ammo, and that number only goes down. Mixing standard and charged shots in a single fight burns through it faster than you expect, since one charged shot alone eats five rounds.
- Save charged shots for finishing low-health enemies rather than opening a fight.
- Lean on standard shots to chip damage and push enemies out of cover, but avoid spamming them.
- Only fire standard shots at targets who are out in the open, not behind cover.
- Carry a strong backup weapon so you are not empty-handed when the Mega Buster runs dry.
Pairing it with the Sonic Power Sneakers is a strong combination. The extra movement speed lets you close the gap and blast enemies at short range before your ammo drains.
What happens when the ammo runs out
There is no way to recharge or reload the Mega Buster. Once the counter hits zero, the weapon is dead weight in your inventory for the rest of the match. You will know it is spent when the ammo readout reads 0 and firing does nothing.
You can drop the Mega Buster or trade it with teammates, which is useful if a squadmate still has rounds to spare and you would rather free up the slot. Treat it as a solid starter weapon for the early game. Against Legendary and Mythic guns later on, it will be outmatched, so plan to swap into something heavier before the final circles.
