We recently received an inquiry about a Magnadyne remote used on two Marksman aftermarket alarm system models. The Magnadyne part is M12ARF-LCD. It is a 5-button LCD keyfob with FCC ID H5OTR05, and it was used on Marksman alarm system models M11A-1** and M12A. (See it at this link.) The transmitter is currently on order.
RUI carries replacement remotes for many Magnadyne systems, including those with Carbine, Magnadyne, Silencer and PL model brands.