Just as a follow up, Warsensor is not related to Ariakon. Armotech was a European brand that came to the states through a distributor with the WG-65. There was a falling out with that distributor and Armotech Europe decided to go with a new company. However, the old company began making M-4 style markers like the WG-65 and called them the Armotech SIM-4. There was a legal battle over the Armotech name and when all was said and done, Armotech Europe changed it's name in the US to Warsensor and released the WS-66 as an update to the WG-65 while the other company changed it's name to Ariakon and continued with the SIM-4 and later SIM-5, ACP, and Overlord lines.
To my knowledge, Ariakon no longer is in business and if they are, they are very low key.