 It was made obsolete by the adoption of the 84mm L14A1 Medium Anti-tank Weapon (MAW) and the 66mm M72 Light Anti-tank Weapon (LAW).The Energa was introduced to infantry units of the British Army of the Rhine from 1952 when it replaced the PIAT.It was issued one per person within the infantry platoon and attached to the waist belt and fired from Projector Mark 5 attached to the Lee–Enfield No.