FN FiveseveN Forums - So what are the odds that they will ever make higher capacity mags?

HunterGrn asked:

FN FiveseveN Forums - So what are the odds that they will ever make higher capacity mags?: "I was thinking it would be nice to have a 30 or even a 40 round extended mag just for kicks. Do you think anyone will ever make some?"

FNMAN said:

There is a company working on a 10 rd extension. You will be able to stack them and springs will be available to get it to 40 rds. It is almost completed. I can not say who it is until they are ready to go to market. The prototypes I have seen are awesome.