I've noticed there are no Inf-AT units prior to the introduction of the locally-made RB-57 in 1957.
According to the above-mentioned "Jugoslavija i NATO 1951-1957", American aid received in 1951-53 included a number of both the M9A1 Bazooka and the M20 Bazookas. Furthermore, the Yugoslav Army had PTRD anti-tank rifles, a small number of PIATs and M9A1 Bazookas and captured Panzerfausts/Panzerschrecks leftover from WW2 (as attested by their WW2 OOB).
Obviously, it's not necessary to represent ALL of this, so I'd propose something like the following.
1. Add UNITS:
M9A1 Bazooka Team 1/46-?
M20 Bazooka Team 1/51-?
PTRD ATR Team 1/46-?
2. change FORMATION 175 start date to 1/46.
3. possibly change AI picklist to include the above formation prior to 1957.
p.s. here's also visual proof for the bazookas - the user manual:
http://mmc.bolha.com/3/image/203917/...f0c92b307d.jpg