A method, apparatus and system for networking and powering accessories to a firearm or weapon wherein the accessories are conductively powered from the rail via at least one pin having a tungsten carbide surface and data is transferred between the accessories and the rail via conductive coupling using the at least one pin. In one embodiment, a weapon is provided, the weapon having: an upper receiver; a lower receiver, the upper receiver being removably mounted to the lower receiver; a powered accessory removably mounted to a rail of the upper receiver; and an apparatus for conductively networking a microcontroller of the powered accessory to a microcontroller of the upper receiver and a microcontroller of the lower receiver.