The HE Rifle Grenade is the same 30mm diameter as the caliber of the Schiessbechere. It has a steel fuze and body with a Bakelite driving band base matched to the rifling.
It used the AZ5071 PD fuze with an internal set-back safety.
Clearly the intent here was to create a more accurate weapon than the spigot launched GG/P 40.
The design was successful due its adapability. As increased explosive power became a necessity, to keep up with the rapidly increasing armor threat, oversized warheads were designed which extended beyond the muzzle.
There are at least 5 versions of the Mod.30, including:
o Combination Rifle and Hand grenade with a self destruct feature.
o Rifle Only, no self destruct with removable bakelite driving band.
o Rifle Only, no self destruct but with fuze and base made of aluminum for more range (Weitschuss).
o Rifle Only, no self destruct, fixed base (the last type).
This one of the combination styles of the Gewehrsprenggranate. (There is a second with a solid base.)
Used as a hand grenade, the base is unscrewed which is attached to a time delay pull fuze (5-7 sec).
As a rifle grenade, there is an internal ignition element in the Bakelite base that is initiated at launch via a small flame port in the bottom screw plug. This would start the time delay fuze, which now acts as self destruct feature.
First production started in February 1942. (These grenades are dated 1942 & 43.)
are the main mechanical components of the AZ5071 PD fuze.
It has a Bakelite striker / firing pin, creep spring, coiled safety band, and setback safety release ring. The detonator screwed into the bottom. Shown at right is the safe (un-fired) condition. The shock of the launch would drive the release ring back over the tabs. This would free the safety coil inside which then expands outward to the wall of the noze cone, this clears the path for the firing pin, which is driven into the detonator upon impact.
Interesting fuze design that found use with the other German munitions as well.
Note: Some have two spanner wrench indentations in the sides of the nose.
1942 dated Combination Type
(Flame port in base.)
1944 dated Rifle Only
(No delay fuze or flame port.)
1944 dated Rifle Only
(Fixed solid base.)