Kingscoy
Senior Airman
Part A is an ammunition counter. It was used to see how many rounds were left. It was however only an indication as it is not an instrument which showed the exact ammount of shots fired. This ammo counter has a max of 500 rounds and was used for example in the Me 109 for the MG 131 13mm guns.
Part B is definitely a weaponssytem related item. The FL number is from the series for weapon systems. Perhaps the FF refers to the MG FF.
Part B is definitely a weaponssytem related item. The FL number is from the series for weapon systems. Perhaps the FF refers to the MG FF.