Just want to share some rare photos of Soviet experimental FSDS / flechette ammo, because i was able to acquire a sample round for my collection (1st photo)
The flechette concept was experimentally pursued in USSR since early 1960s, following the development of the 100mm APFSDS ammo for AT guns
One of concepts was to develop a ‘rifle / MG’ type round, with intent to replace obsolete 7.62x54R
All known prototypes used Novosibirsk-made (188 code) x54R cases, necked out to about 10mm (some bottlenecked, some just tapered)
Sabots were made either from polymer or aluminum, with 2 halves.
Steel darts / flechettes had threads around the body to provide better grip for the sabot; dard caliber is roughly 4.5mm, weight is not yet measured, MV is about 1150 m/s if i remember it correctly
test weapons were Goryunov SGM (with smooth-bore 10mm barrel) and Dragunov SVD (also smooth-bored to 10mm)