This ww2 German weapon system was 15 or 30mm cannon taken from aircraft and mounted in 3’s on a simple conical mount.
These were fitted to everything from simple wooden carts to U boats.
They were also widely used on trucks and the larger 251 h/tracks, we have a 251 h/track mount kit with the extra armour on a separate entry.
These are sold in single mounts
This kit skill level is B
72 scale conversion kit skill ratings:-
A = easy to assemble or simple add on parts
B = slightly harder to assemble a bit more time/skill needed.
C = harder to assemble with more fiddly parts and time needed to complete