SP1538 Mainspring Screw (Colt mfg'd) for Colt 1851 Navy

These parts fit the modern manufactured Colts. Some parts will fit old pre-war single actions, original 1851, 1860, 1861 and other original Colts. Hammers, cylinder stops, trigger springs, hand & spring and screw will interchange (old & new.) These include the Single Action Army, pre-war 1873 Model and the New Frontier Single Action with “SA” serial numbers. Post-war single action barrels and cylinders vary from pre-war models.