Kammala jumla mai zuwa: 504th Infantry Regiment, asali 504th Parachute Infantry Regiment (504th PIR), wata runduna ce ta rundunar sojan sama ta Amurka, wani bangare na 82nd Airborne Division, tare da dogon tarihi. An fara kafa rukunin a tsakiyar 1942 a lokacin Yaƙin Duniya na II a matsayin wani ɓangare na 82nd Airborne Division kuma ya ga sabis a Sicily, Italiya, Anzio, da
Netherlands, Belgium da kuma Jamus.