If you are looking for replacement parts for your Liftmaster LA500DC swing gate operator then you have come to the right place.We offer a complete line of LA500DC parts at discount prices. Most parts are in Stock and ship the same day, This Liftmaster gate operator actuator arm is the top of the line, it includes the Liftmaster MyQ system so you can open,close and monitor the gates openings from your smart phone or computer.