A rugged integrated helmet vision system is disclosed. The system includes an accessory connector for connecting an accessory such as a heads-up display (HUD) device to a helmet worn by a user. The accessory connector includes a connector arm assembly with a portion that attaches the connector to the helmet, and another portion that attaches the accessory to the connector. The portions each provide multiple degrees of freedom of movement to allow adjustment of the connector with respect to the helmet, and adjustment of the accessory with respect to an eye of the user. The connector also provides the ability to lock positions of and the degrees of freedom of movement of the connector arm assembly via a single locking actuator with one-handed operation. In embodiments, a control box computer system at the helmet communicates with various soldier-portable networks to send and receive information for display by a HUD device accessory.