In addition , FACC had developed a proximity - sensing round for the 40 mm , which increased probability of a kill .
The shell carried either a greater explosive charge or higher deadweight mass than the smaller anti-aircraft platforms .
In addition , FACC had developed a proximity - sensing round for the 40 mm , which increased probability of a kill , and the shell carried either a greater explosive charge or higher deadweight mass than the smaller anti-aircraft platforms .