DJ -
as requested. From the Dutch Munitions Technology Museum (MTM), here is a Soviet 122mm flechette projectile, a 152mm, a Soviet 80mm rocket warhead missing its flechettes, and an intact Soviet 57mm flechette warhead (black paint).
I would note two details, first that the two projectiles have flechettes placed inside for display only, not typical of the way flechettes have been normally observed in these projos (see earlier posts in this thread). Second, in the 122mm cut-away you can clearly see the expulsion charge, tube and pusherplate which are similar to the manner of expulsion for WWI era shrapnel projectiles.