How to make it shoot more precise, than it initially is?

I made a shooting game but the guns accuracy are REALLY BAD, and this will really affect the gameplay, would anyone share a thought of how to stop this? :)

function Shoot()
	if not db then
		db = true
		
		  Sound:Play()

		  NewBullet = Bullet:Clone()
		  NewBullet.Parent = game.Workspace
		      NewBullet.Position = Aim.Position
		
		NewBullet.Touched:Connect(function(hit)
			pcall(function()
				   hit.Parent:FindFirstChild("Humanoid"):TakeDamage(20)
			print(hit.Name)	
		end)
	end)
		  
		  local BodyVelocity = Instance.new("BodyVelocity")
		
		  BodyVelocity.Parent = NewBullet
	
		    BodyVelocity.Velocity = Mouse.Hit.LookVector*100
		BodyVelocity.MaxForce = Vector3.new(50, 50, 50)
		wait(1)
		Reload:Play()
		wait(1)
	    db = false	
	end
end