There are some weapons that can not take Flechette
What are they? Well except Assault canons and exotic weapons ...
We have a pistol with 30 rounds of ammo
What stops you from loading your Remington Suppressor with a flechette? Or maybe Steyr TMP with the same 30 round clip AND full auto mode? Both these options are R btw.
Good question, I'd like to know that as well. Maybe Flechette is not meant for regulr guns. Actually it's hard to imagine packing a bunch of slivers into a regular bullet as opposed to a shotgun casing.
There was a lot of serious development of small arms flechette ammo by a half dozen countries from the 1950s through to the mid 80s. This research (from the US military side) was as a weapon lkie in SR, but more of a delivery vessal for nerve agents like VX.
Nowadays, its only really 12g shotgun rounds that use a flechette load similiar to what is in SR: which much the same effect thanks composite armors used today (military grade armored vests render flechette useless as the flack protection stops them, while the composite plating absorbs the kinetic impact).
The closest we have now are large bore "shot" ammo for pistols. Good for small bird hunting and home protection.