PA-120 40 Ammunition container
Its open seen sitts on the left side MK19 Machine Gun, used to shipping and store 40mm cartidges.
Different from 30cal or PA-108 contianer, not using hinge to connect the lid, it has quick relase latches on 
each end of the box. With seal fixed inside the lid, it could keep the mositure outside the contianer, keep
the ammo safe from getting wet.

Yunkai start to produce PA-120 ammo can since 2017,  production capacity of this 40mm ammo boxes is 900 pieces every single day.