ClientCast - A Client-based, Idiosyncratic Hitbox System!

[PysephDEV (Pyseph)]

You could use the new spatial query API:

Introducing OverlapParams - New Spatial Query API

We are adding new WorldRoot (Workspace) APIs for performing spatial queries on BaseParts. It’s never been easier to figure out what Parts are within a given box, radius, or other Part! New Spatial Queries Here are three new functions that can be used: Objects WorldRoot:GetPartBoundsInBox(CFrame cframe, Vector3 size, OverlapParams overlapParams) Returns a table of all BaseParts whose bounding boxes overlap the given box at cframe and size. cframe is for the center of the box, and orientation…

Additionally, you can just loop over all players in-game and find which ones are close enough.