Well, since the FAL was designed to accept 20rnd mags and 30rnd mags were a rather unsuccessful afterthought, "high capacity" is probably appropriate.
On that note, 7.62x51 30rnd magazines are long, heavy, and have a history for unreliability (with the exception of top feeds, like BrEn and it's father, the ZB-xx). I wouldn't own any more than one of any type, mainly as a curiosity.