These are sequentially serial numbered.
MANUFACTURER: Rock Island Armory MODEL: M1911-A1 GI TYPE: Semi-Auto Pistol ACTION: Single Action CALIBER: 45 ACP FINISH: Parkerized FRAME: Steel Frame STOCK/GRIPS: Black Rubber BARREL Threaded: 5" OVERALL LENGTH: 8.54" CAPACITY: 8+1 # OF MAGAZINES: 1 MAG DESCRIPTION: 8 rd. SIGHT TYPE: Fixed Sights SPECIAL: Threaded Barrel Model WEIGHT: 2.47 lbs. SHIPPING WEIGHT: 3.95 lbs. SAFETY FEATURES: Frame Mounted ADDL INFO: GI Hammer, Beavertail, Sights ADDL INFO: Threaded Barrel ADDL INFO: Beveled Magazine Well MFG MODEL NO: 51473 UPC: 4806015514732