How can you remove/move metal bar?

[NANO]

There is an house in red ville that has metal bar blocking the entrance. How do I move them?

[Hellfar]

This is a near end game ability.

Once your gun's altfire can perform enough damages, you can melt those iron planks.
You'll get notified in the game when you can perform this.
The way to increase your damages gun's altfire is through augmentations you can find in chests.

[Lumi Platinum]

there is a guide pertaining to this but it is severely outdated. Anyone know where altfire #4 is?

[fejj12]

Bringing this back up.... #4 has changed. It is a different item in the treasure chest. Does anyone know where alt fire #4 is now?

https://www.youtube.com/watch?v=qMxa5w7ZPQ4

[Jules]

Here's some general location info on 5 alt fires based on my notes. Numbering not related to video.

1. Near where you got the Stomp Boots, go along to end of valley and up some blue launchers then solve a puzzle to open door.
2. Beyond Supraball Sports hall on way to belt buckle where the giant moveable green pipe launcher is, there's a chest up on a ledge.
3. There's one hidden away in the building below the blue crystal in the back area. You have to open something from inside the main building.
4. In the roof of one of the buildings in the Castle Courtyard
5. In the area with the farting meatbag boss (behind a large rocky area opposite end)

I think I updated my notes after the change, so hope it helps.

J