The M50 grenade (Kragujevka) is a Yugoslav hand grenade.
The grenade model consists of a body, head with a pin and a cap.You can insert the pin tightly so that it is above head, or you can glue them together.
There are two versions of the grenade, full and hollow with a screw cap, which you can fill with something if you want it to be heavier, or you can use it as a small container or a hidden stash.
Model was printed in PLA+, it can also be printed in PETG. Printed it at 0.2 layer height with adaptive layers by 0.08, 0.4 layer width, with 4 or 5 walls, 5 top and bottom layers, and 20% cubic infill.