Most sources said that we have abt 720 M113s, and TH said that
it has increased to abt 1000 units.Let's assume it is 720
units.
There are abt 100+ in oversea training grounds so those will not
avialable immediately during conflict , and some not just use for
AI only , Arty units with 120 SP mortar carriers , armoured pioneer
Pl in AEC, some maybe in support unit as ARVs and maybe some in
Medical support units as ambulances.
I have no figure for such units but the number could be as high as
300+ for support units and oversea training.
So leaving abt 400 M113s , just enough for abt 3 armoured bde.(
Ultra?)
From 90s to now, we have expanded to RDF 21 Div with armoured
element of 22 AMX-10 25ICV and 22 fire support PAC90s.
( A bit small , some additional armour I believe is needed here,
M113 Arisgator might be good upgrade)
Then there is the rumoured mechanised div. If this is formed then
it will need more IFVs( 360~400 Bionix?), remember the 54 Primus
SPH.
One such div will need two Bn of Primus i.e. 36 Primus.
My point is , if indeed going have mechanised div , we do indeed
need more IFVs and if Bionix is to replace the M113, then it will
be foolish for SAF to upgrade some M113 to Ultra in the first place
which is completed just before the introduction of Bionix.