local target = nil
local ents = minetest.get_objects_inside_radius(self.object:getpos(), MGTURRET_RADIUS)

for k, ent in ipairs(ents) do
    if ent:is_player() then
    target = ent
    minetest.debug("Found target: " .. target:get_player_name())
    end
end

if target == nil then
    minetest.debug("null!??!?! we have target!")
end