The grenades on this page are all unnamed as they were all manufactured on a small scale during the civil war.
Information comes again from an Austrian EOD manual.

Total length : 323 mm
Diameter : 40 mm
Weight : ? gram
Filling : ? gram
Fuze : unknown

This improvisation is also known as RG 91.

Total length : 267 mm
Diameter : 42 mm
Weight : ? gram
Filling : ? gram
Fuze : unknown

Photo below shows a similar form, but different fragmentation.
© EODKLu.

Total length : ? mm
Diameter : ? mm
Weight : ? gram
Filling : ? gram
Fuze ? unknown

Total length : ? mm
Diameter : ? mm
Weight : ? gram
Filling : ? gram
Fuze ? unknown

Total length : 267 mm
Diameter : 42 mm
Weight : ? gram
Filling : ? gram
Fuze : unknown

Total length : ? mm
Diameter : ? mm
Weight : ? gram
Filling : ? gram
Fuze ? unknown

Total length : ? mm
Diameter : ? mm
Weight : ? gram
Filling : ? gram
Fuze ? unknown

It appears that this riflegrenade is made of a 60mm mortar shell.

Total length : 328 mm
Diameter : 30 mm
Weight : ? gram
Filling : ? gram
Fuze : unknown

Total length : 255 mm
Diameter : 40 mm
Weight : ? gram
Filling : ? gram
Fuze : unknown

Cazinka

Manufactured in the city of Cazin.

Total length :
Diameter :
Weight :
Filling :
Fuze :

Photo © Vahid

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The images below show some more types of improvised riflegrenades, photographed by the EODKLu, NL :