M1 on Roblox usually means Mouse Button 1 , which is the left mouse click on PC. In many Roblox games, it’s the basic attack or interact button.

In game terms

  • M1 = left click.
  • In combat games, it often means your basic attack or first attack input.
  • Some games may use it for clicking, punching, swinging, or shooting depending on the game’s controls.

Example

If a Roblox game says “press M1 to attack,” you just click the left mouse button.

Quick note

On a keyboard, M1 is not usually a keyboard key by itself; it’s mostly shorthand for the first mouse button.