The Challenger Armament or CHARM project was intended to provide a new main armament for the Challenger II tank and to be retrofitted to the Challenger 1. It involved three components: the gun, developed by the Royal Ordnance Factory, Nottingham, the Depleted Uranium (DU) APFSDS round and a propellant charge for it. After earlier projects were cancelled, the EXP 32M1 experimental gun was retitled the XL30E3 and accepted for production as the L30 in 1989.