This paper deals with the application of acoustic instrumentation setup in the test and evaluation of armament stores. Different types of acoustic sensors and suitability of these sensors for different measurement applications were presented. The rate of fire measurement of a naval gun, the acoustic signature of Cargo Minelet functioning, and high explosive warhead functioning results were presented. The rate of fire (ROF) of a gun is defined as the number of rounds fired per minute. A high rate of fire is one of the most important requirements for a naval gun. Acoustic measurement setup was developed to measure ROF of the order of 4700 rounds per minute. Cargo ammunition is a carrier projectile which carries the functional payload to the target area. The payload contains a number of sub-munitions in the form of minelets. The performance evaluation of cargo ammunition in terms of minelet functioning were covered with measurement results. The results of the functioning of 130 mm high explosive artillery shells were also presented.