Complex sentence: The rifle uses the Galil's long-stroke piston system, as also found in the AK 47 (upon which Galil's internal mechanism design borrowed) and more recently in the Tavor.
Split into simpler sentences: The rifle uses the Galil's long-stroke piston system. The long-stroke system is found in the AK 47 (upon which Galil's internal mechanism design borrowed) and more recently in the Tavor.