How to send projectiles to mouse position?

Ok so I'm making a gun for my game, and I already have a script that shoots a projectile out of the barrel, but I don't just want it to go forward, since it's a 3rd person game and it'd be impossible to aim, but instead the projectile would travel to to the player's mouse in the workspace. Is there any way to do this?

There are many type of proyectiles, such as Raycast bullets, parts moved with BodyVelocity...

In case you want a rocket-like proyectile, you may need a script like this:

local player = game:GetService("Players").LocalPlayer
local tool = script.Parent

local speed = 30

tool.Equipped:Connect(function(mouse)
	mouse.Button1Down:Connect(function()
		local rocket = Instance.new("Part",workspace)
		rocket.Name = "Rocket"
		rocket.Size = Vector3.new(1,1,3)
		
		local mousePos = mouse.Hit.p

		--Setting the angle between the mouse and the Handle

		local angX,angY,angZ = CFrame.new(tool.Handle.Position,mousePos):ToEulerAnglesXYZ()
		
		rocket.CFrame = CFrame.new(tool.Handle.Position) * CFrame.Angles(angX,angY,angZ)
		
		local force = Instance.new("BodyVelocity",rocket)
		force.MaxForce = Vector3.new(400000,400000,400000)

		force.Velocity = (mouse.Hit.p - tool.Handle.Position).unit * speed
		
		rocket.Touched:Connect(boom)
	end)
end)

function boom(hit)
	print("Proyectile collided with "..hit.Name.."!")
end

Otherwise, If you need a proyectile that reaches It's target in almost no time, then you need Raycasting:

https://developer.roblox.com/en-us/articles/Making-a-ray-casting-laser-gun-in-Roblox