Special Features:

Receiver assembly, radio firing device. Electric blasting cap actuating xm39. Receiver, upon received coded signal from m27 transmitter, produces an electrical output capable of initiating up to four m6 blasting caps; this item also known as 'receiver, transmitter subassembly: m39 magneto-inductive (mi) rams'

Properties:

Two or more different types of items, having a common mounting or mounted on each other, which together form a portion of a receiver-transmitter, but which in itself is not a complete functioning item and cannot be assigned a more definite item name.