SA | Aperature | B8868-1 | Type 1 | January/1936 to November/1939 | 1 - 20000 | Gas trap, no tracks on bottom surface on either side of the teeth. Drawing number "B8868-1" stamped on upper curved surface. |
SA | Aperature | B8868-1 | Type 2 | November/1939 to February/1940 | 20000 - 28000 | No tracks on the bottom of either side of the teeth and drawing number omitted. |
SA | Aperature | B8868-1 | Type 3-1 | February/1940 to December/1957 | 28000 - 6100500 | Early version. Rounded ramp shoulders below aperature disk. Narrow tracks (0.065 inches wide). |
SA | Aperature | B8868-1 | Type 3-2 | February/1940 to December/1957 | 28000 - 6100500 | Late version. Squared ramp shoulders below aperature disk. Wide tracks (0.085 inches wide). Edges of aperture disk smoothly finished. |
SA | Aperature | B8868-1 | Type 4/5 | December/0 to December/0 | 0 - 0 | NM. Part#s 7268110(0.0520 inch peep hole) and 7268109(0.0595 inch peep hole). Type 5 was the hooded NM version. |
SA | Barrel | D28286 | N/A | January/1936 to June/1940 | 1 - 50000 | Gas Trap barrel. |
SA | Barrel | D35448 | N/A | July/1940 to December/1957 | 50001 - 6100500 | Generally dated to within 3 months of Receiver manufacture date. |
SA | Bolt | 6528287-SA | A-10 | January/1952 to December/1954 | 4240000 - 5329999 | |
SA | Bolt | 6528287-SA | A11 | January/1952 to December/1954 | 4240000 - 5329999 | |
SA | Bolt | 6528287-SA | A13 | January/1954 to December/1955 | 5290000 - 5439999 | |
SA | Bolt | 6528287-SA | A14 | January/1954 to November/1957 | 5330000 - 5869999 | |
SA | Bolt | 6528287-SA | A15 | January/1954 to December/1957 | 5420000 - 5969999 | |
SA | Bolt | 6528287-SA | A16 | January/1955 to December/1957 | 5900000 - 5999000 | |
SA | Bolt | 6528287-SA | B-2-O | January/1952 to December/1957 | 4200001 - 4229999 | |
SA | Bolt | 6528287-SA | J-1-A | January/1952 to December/1957 | 4200001 - 4229999 | |
SA | Bolt | 6528287-SA | J1B | January/1952 to December/1954 | 4200001 - 4229999 | |
SA | Bolt | 6528287-SA | US1 | January/1952 to December/1954 | 4200001 - 4229999 | |
SA | Bolt | 6528287-SA | US2 | January/1952 to December/1954 | 4240000 - 4289999 | |
SA | Bolt | 6528287-SA | Y01 | January/1955 to December/1957 | 5790000 - 6100500 | |
SA | Bolt | 6528287-SA | Y02 | January/1955 to December/1957 | 6080000 - 6100500 | |
SA | Bolt | 6528287-SA | Z1 | January/1955 to December/1957 | 5800000 - 5900000 | |
SA | Bolt | 6528287-SA | Z2 | January/1955 to December/1957 | 5800000 - 5900000 | |
SA | Bolt | 6528287-SA | Z3 | January/1955 to December/1957 | 5800000 - 5899000 | |
SA | Bolt | 6528287-SA | Z4B | January/1955 to December/1957 | 6080000 - 6100500 | |
SA | Bolt | D28287-1 | C1 | May/1939 to May/1940 | 10704 - 41679 | |
SA | Bolt | D28287-1 | D1 | May/1940 to May/1940 | 38035 - 41679 | |
SA | Bolt | D28287-1 | D5 | May/1939 to May/1940 | 10704 - 41679 | |
SA | Bolt | D28287-1 | J-15-H | May/1939 to May/1940 | 10704 - 41679 | |
SA | Bolt | D28287-1 | J-15-K | May/1939 to May/1940 | 10704 - 41679 | |
SA | Bolt | D28287-1 | J1 | May/1939 to May/1940 | 10704 - 41679 | |
SA | Bolt | D28287-1 | J3B | September/1939 to September/1939 | 14824 - 17010 | |
SA | Bolt | D28287-1 | J4 | May/1939 to May/1940 | 10704 - 41769 | |
SA | Bolt | D28287-1 | J6 | May/1939 to February/1940 | 10704 - 30008 | |
SA | Bolt | D28287-1 | J7 | April/1940 to April/1940 | 33791 - 38034 | |
SA | Bolt | D28287-12SA | A8W | November/1942 to November/1942 | 940251 - 1008899 | |
SA | Bolt | D28287-12SA | B10<> | March/1942 to December/1944 | 489217 - 3359159 | <> Indicates 8620 steel. |
SA | Bolt | D28287-12SA | B3 | March/1942 to December/1944 | 498217 - 3359159 | |
SA | Bolt | D28287-12SA | B4A | November/1942 to December/1942 | 940251 - 1090310 | |
SA | Bolt | D28287-12SA | B4B | March/1942 to December/1944 | 498217 - 3359159 | |
SA | Bolt | D28287-12SA | B8 | February/1943 to June/1943 | 1169092 - 1710012 | |
SA | Bolt | D28287-12SA | O11A<> | March/1942 to December/1944 | 498217 - 3359159 | <> Indicates 8620 steel. |
SA | Bolt | D28287-12SA | RE4E | March/1942 to December/1944 | 498217 - 3359159 | |
SA | Bolt | D28287-12SA | RE5B | March/1942 to July/1942 | 498217 - 749779 | |
SA | Bolt | D28287-12SA | RE5C | January/1942 to December/1942 | 429812 - 1090310 | |
SA | Bolt | D28287-12SA | RE6B | June/1942 to October/1942 | 638670 - 940250 | |
SA | Bolt | D28287-12SA | S-04<> | November/1942 to December/1944 | 940251 - 3359159 | <> Indicates 8620 steel. |
SA | Bolt | D28287-12SA | S-06<> | August/1943 to August/1943 | 1786470 - 1877654 | <> Indicates 8620 steel. |
SA | Bolt | D28287-12SA | S-11<> | October/1942 to December/1942 | 872344 - 1090310 | <> Indicates 8620 steel. |
SA | Bolt | D28287-12SA | S-A1<> | January/1944 to November/1944 | 2420192 - 3302641 | <> Indicates 8620 steel. |
SA | Bolt | D28287-12SA | S-A3<> | March/1942 to December/1944 | 498217 - 3359159 | <> Indicates 8620 steel. |