Mario, the Federal Ordnance Ranger 1911A1 GI was manufactured from 1988-1992 and patterned after the Colt 1911A1 Gov't Model. It consisted of all-steel construction with a 5" barrel, 7-shot magazine and checkered walnut grips. The 1911A1 GI model was only chambered in .45 ACP. In excellent condition this handgun could be worth about $310-$385. Slight premiums would be added for the Extended Model, Ambo, or Lite Model variants. Hope this helps!
Steve Mace