In 1934, a new type of cupola was adopted. Just like the A type, it had 3 to 5 embrasures. It had slightly thicker armour and most importantly, much better protected mounts.
These ball mounts were integrated into the embrasures and were capable of resisting a 25mm hit when in use, and could withstand a 47mm hit when closed/with it’s opening turned away.
The embrasures had a conical shape, able to withstand heavier impacts, this in contrast with the A types.
|2.17 m||1.78 m||0.25 m||17t|
|2.55 m||1.88 m||0.30 m||27,0 t|
|Base for GM||0.67 m||2,5t|
|Base for PM
The installed equipment was limited to a FM 24/29 or a diascope.
Two models were produced, the PM and GM model. The PM was meant to be used on fortifications with protection level 1 and 2 (refers to concrete thickness), and the GM on protection level 3 or 4 fortifications.