Late merlons permitted fire from the first firearms.

Late in the war a sight adapter was introduced to permit upper register (high angle) fire when the wheels were raised significantly above the level of the spades.

The Fire control unit includes ambidextrous safety/fire selector switch, which permits single shots, 2-round bursts and full automatic fire.

On the western and eastern sides, the mound lines have many ori (cremaillere, a front or face with receding steps, which consists of short and long branches) which permit flanking fire.

If needed, the ALO can be pushed up to permit automatic fire.

The trigger mechanism permits fully automatic fire only but the rate of fire can be adjusted by using bolts of varying weight, like in the MG 3.

Larger calibres were also used, but for these calibres the design simply permitted rapid manual loading rather than true automatic fire.

There was some discussion about redesign to permit full-automatic fire; but production was halted after a total of 1,227 rifles mad been manufactured.

Later, towers were added along the walls to permit flanking fire against attackers.