The photos below show a practice grenade of the RPG43, Polish version.
The firing mechanism is slightly different from the original, the head is made of thick rubber.
The base of the head is made of machined aluminium and holds the small smoke charge.
The grenade is reusable after recocking the mechanism and replacing the charge.

Drawing on the right thanks to Przemek.

Total length : 294mm
Diameter head : 92mm
Weight : 1120gram


The grenade below is a similar practice grenade but manufactured in a different way.

Photos © an eBay seller.