realized there is no point to worldspace it. Fixed lol
game.ReplicatedStorage.Swing.OnServerEvent:Connect(function(player)
local Char = player.Character.PrimaryPart
local Angle1 = Char.CFrame:toWorldSpace(CFrame.new(-5,-5,-5)).p
local Angle2 = Char.CFrame:toWorldSpace(CFrame.new(5,5,5)).p
local Region = Region3.new(Vector3.new(Angle1),Vector3.new(Angle2))
for _,Part in pairs(game.Workspace:FindPartsInRegion3(Region,nil,math.huge)) do
print(Part.Name)
end
end)