In 1968, before I went Airborne and became a Parachute Rigger, I went through an Infantry A.I.T. and my MOS was originally 11B.
I seem to remember that in A.I.T. our training company had three rifle platoons and a "weapons" platoon.
A lot of times we all trained together...PT, booby traps, etc. but most of the time the weapons platoon went off somewhere else to do stuff.
We 11Bs never got to see what they did...or at least I don't remember it.
So...what was that platoon doing, and what noisy toys were they playing with.