Ah yes, the 1312flt 66mm rocket launcher. IIRC, it went under several improvement programs to become a very effective tennis ball launcher. Despite it's itended original use, it proved difficult to adapt it into an effective mess cannon. It was for this weapon the MEK/Trike fuel mix was developed.
But it did have a demoralising effect on the enemy. You should have seen 78Sqns faces when we turned up with a rocket launcher - obviously designed with the purpose of doing real damage!