Well,it can be a CTF only weapon.
But I have a much cooler idea:
You can tag anybody with the weapon,but it'll only ping,if you have it in your hand. If the tracked one is killed,the weapon deplets,and you loose it. If you switch to other weapon while tracking, the beacon automatically returns, and you loose the tracked (but your weapon remains). Secondary fire mode retrieves the tracker device. (to be continued)
Now on the fun part: