Complex sentence: The FAL was itself a re-designed version of FN's own design for an intermediate cartridge rifle using the.280 round (first protoypes had used the 7.92x33mm Kurz German round from the MP44) but was more easily adaptable to handle the more powerful, longer round.
Split into simpler sentences: The FAL was itself a re-designed version of FN's own design for an intermediate cartridge rifle using the.280 round (first protoypes had used the 7.92x33mm Kurz German round from the MP44). However, the FAL was more easily adaptable to handle the more powerful, longer round.