Player Made Weapon
From Space Engineers Wiki
Player-made weapons are, as their name suggests, weapons made by players. They can be based on any type of grid, and will use mechanics proposed by the game (such as Gravity).
These objects refer to objects made in the vanilla game, and are not Modded Blocks.
Examples of Player-Made Weapons (PMW) are gravity guns, firing a projectile using gravity, seeking missiles, catapults...
