MFG | Component | Drawing Number | Heat Lot/Type | Date Range | Serial# Range | Notes |
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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 | Barrel | D35448 | N/A | July/1940 to December/1957 | 50001 - 6100500 | Generally dated to within 3 months of Receiver manufacture date. |
SA | Bolt | D28287-2SA | C12A | October/1940 to October/1940 | 68055 - 78306 | |
SA | Bolt | D28287-2SA | C12B | June/1940 to March/1942 | 41680 - 542494 | |
SA | Bolt | D28287-2SA | C13 | June/1940 to March/1942 | 41680 - 542494 | |
SA | Bolt | D28287-2SA | J9A | June/1940 to March/1942 | 41680 - 542494 | |
SA | Bolt | D28287-2SA | J9B | June/1940 to March/1942 | 41680 - 542494 | |
SA | Bolt | D28287-2SA | RE4E | June/1940 to March/1942 | 41680 - 542494 | |
SA | Bolt | D28287-2SA | RE5 | June/1940 to March/1942 | 41680 - 542494 | |
SA | Bolt | D28287-2SA | RE5C | June/1940 to March/1942 | 41680 - 542494 | |
SA | Bolt | D28287-2SA | T1 | September/1940 to November/1940 | 59869 - 90177 | |
SA | Bullet Guide | B8875 | Type 2A | September/1940 to August/1941 | 65001 - 300000 | Forged and milled, narrow slot. Marked "B8875-1SA". |
SA | Buttplate Assembly | C64283 | Type 2 | October/1940 to December/1957 | 70001 - 6100500 | Cap, 12 squares in vertical row intersecting screw hole. |
SA | Clip Ejector | C46018 | N/A | January/1936 to December/1957 | 1 - 6100500 | Early were blued, late were parkerized. |
SA | Clip Latch | C46011 | Type 1B | July/1940 to March/1944 | 50001 - 2720000 | Rounded front end at top, unmarked |
SA | Clip Latch Pin | N/A | N/A | January/1936 to December/1957 | 1 - 6100500 | 3.280 inches long,head is 0.155 inches in diameter and 0.065 inches high. Opposite end slightly rounded. Body of pin is 0.119 inches in diameter. |
SA | Clip Latch Spring | N/A | N/A | January/1936 to December/1957 | 1 - 6100500 | 0.03 inch steel wire, 5 coils, outside diameter 0.26 inch. White finish is original, Parkerized indicates refinishing. |
SA | Elevating Pinion | N/A | Type 1 | January/1936 to March/1942 | 1 - 540000 | Short with 6-40NF thread, with flush nut. Early examples (to circa 46,000-47,00) were marked inside with the part number. |
SA | Elevation Knob | N/A | Type 1B | June/1940 to September/1942 | 46000 - 850000 | No part number, checkered rim with closed arrowheads. |
SA | Extractor | N/A | N/A | January/1936 to December/1957 | 1 - 6100500 | Blued or Parkerized during WWII, all Parkerized after WWII. |
SA | Extractor Spring and Plunger | B8886 | N/A | January/1936 to December/1957 | 1 - 6100500 | Early may be blued. |
SA | Firing Pin | B8879 | Type 1 | January/1936 to December/1941 | 1 - 425000 | Round cross section. |
SA | Follower and Slide | N/A | Type 1C | May/1940 to May/1941 | 39001 - 240000 | Marked with "3". |
SA | Follower and Slide | N/A | Type 1D | May/1940 to May/1941 | 39001 - 240000 | Unmarked |
SA | Follower Arm | B8869 | Type 3 | March/1940 to July/1941 | 33001 - 290000 | Unmarked. Single shallow bevel on left side above pin hole. Follower arm lugs were rounded. |
SA | Follower Arm Pin | A13667 | Type 1 | January/1936 to December/1941 | 1 - 429000 | 0.15 in rebate at end. |
SA | Follower Rod | C46014 | Type 1A | January/1936 to November/1940 | 1 - 79000 | Drawing number on rod. Short fork. 14 vertical knurls, round behind shoulder. Used with compensating spring. |
SA | Follower Rod | C46014 | Type 1B | January/1936 to November/1940 | 1 - 79000 | No drawing number on rod. Short fork, 14 vertical knurls, round behind shoulder. Used with compensating spring. |
SA | Follower Rod | C64331 | Type 2 | October/1940 to February/1941 | 70000 - 190000 | Short fork. Drawing number not marked, round behind shoulder. No compensating spring. |
SA | Front Hand Guard | C64245 | N/A | August/1940 to December/1957 | 50001 - 6100500 | |
SA | Front Site | B147427 | Type 3A | July/1940 to December/1957 | 50001 - 6100500 | Between 0.625 and 0.687 inches wide at blades. Smaller dimension usually associated with WWII. |
SA | Front Site Screw | N/A | Type 2 | July/1940 to February/1943 | 50001 - 1360000 | Rebated Allen socked head, used with seal. |
SA | Gas Cylinder | D-35449-1 | Type 2A | July/1940 to August/1941 | 50001 - 315000 | .50 inch front sight base, flat top on rear ring, marked "D-35449-SA" right side of rear ring. |
SA | Gas Cylinder Lock | B147426 | Type 1 | July/1940 to March/1945 | 50000 - 3592000 | Front face chamfered,no hump, unmarked. 1.225 - 1.335 inches high. Unmarked. |
SA | Gas Cylinder Lock Screw(Plug) | B147428 | Type 1 | July/1940 to January/1944 | 50000 - 2500000 | Single slot, no valve/poppet. Unmarked. |
SA | Hammer | C46008-2 SA | Type 2B | September/1940 to June/1942 | 65001 - 680000 | Drawing number either on right side or face, late hooks, no tooling hole. |
SA | Hammer | C46008-2SA | Type 2A | September/1940 to June/1942 | 65001 - 680000 | Drawing number either on right side or face, late hooks, not tooling hole. |
SA | Hammer Pin | A13668 | N/A | January/1936 to December/1957 | 1 - 6100500 | |
SA | Hammer Spring | B8887 | N/A | January/1936 to November/1957 | 1 - 6100500 | 20 coils |
SA | Hammer Spring Housing | B8883 | Type 2 | July/1940 to December/1957 | 50001 - 6100500 | 45 degree slant cut at ends of safety slot |
SA | Hammer Spring Plunger | B8880 | Type 1 | January/1936 to October/1945 | 1 - 3888081 | 1.542 inches long, "winged" head, 0.459 inches wide. |
SA | Handguard Clip | N/A | Type 1B | May/1941 to August/1942 | 40001 - 780000 | Milled with arched profile. Grove centered on band length wise .07 inches wide by .02 inches deep. |
SA | Handguard Ferrule | N/A | Type 2 | June/1940 to December/1957 | 50001 - 6100500 | Lip protruding .06 inches from rear barrel hole. |
SA | Handguard Liner | B8893 | Type 3 | July/1940 to December/1957 | 50001 - 6100500 | Unmarked. Front hole is .350 inches from edge, rear hole is .490 inches from edge. Notch is .70 inches wide by .15 inches deep. |
SA | Lower Band | C46000 | Type 2 | October/1940 to June/1943 | 70001 - 1650000 | Stamped arched profile with no groove or scallops. Unmarked. |
SA | Lower Band Pin | N/A | Type 1 | January/1936 to December/1951 | 1 - 3888999 | Solid pin. |
SA | Operating Rod | D35382-1-SA | 2B | April/1940 to January/1941 | 38001 - 175000 | Straight bolt lug, no radius cut, curved side, marking on bottom |
SA | Operating Rod Catch Assembly | C46027 | Type 1 | January/1936 to July/1942 | 1 - 700000 | Marked with "O". Right and Left fork 0.08 in wide, width at accelerator rivet 0.73 in. |
SA | Operating Rod Spring | B46019 | N/A | January/1936 to November/1940 | 1 - 79000 | Square cross section. Utilized in conjunction with a compensating spring. |
SA | Rear Hand Guard | C46024 | Type 1 | January/1936 to March/1941 | 1 - 200000 | No operating rod clearance cut. |
SA | Rear Sight Base | C46001 | Type 1B | January/1940 to October/1940 | 25000 - 75000 | No "C46001" stamped on the flat underside, machined with a rounded area behind hole for elevation/windage knob shaft. |
SA | Rear Sight Cover | B8872 | Type 1D | July/1940 to December/1940 | 50000 - 95000 | Smooth, no reinforcing indentations along top and sides. Not marked. |
SA | Rear Sight Lock Nut | N/A | Type 1 | January/1936 to March/1942 | 1 - 530000 | Flush nut, short pinion, 6-40NF thread |
SA | Receiver | D28291-3SA | N/A | September/1940 to May/1941 | 65001 - 247000 | |
SA | Safety | C 46015-4SA | Type 1F | April/1940 to October/1940 | 34001 - 75000 | Flat upper side and top, marked "C 46015-4SA" |
SA | Stacking Swivel | B8891 | N/A | January/1936 to December/1957 | 1 - 6100500 | Up to serial# 20000 were marked "B8891". |
SA | Stacking Swivel Screw | N/A | N/A | January/1936 to December/1957 | 1 - 6100500 | |
SA | Stock | D35647 | Type 2A | October/1940 to October/1940 | 70001 - 78000 | .81/.81 butt stock holes, 2.15 inch channel, inward angle clip latch relief, S.A./S.P.G. (.75""X.81"") |
SA | Stock Ferrule Assembly | C40613 | Type 1B | August/1939 to November/1940 | 13001 - 90000 | Forged and milled, no markings. |
SA | Trigger | C46020 | Type 1D | February/1940 to November/1940 | 30001 - 80000 | 0.185 inch diameter tooling hole. No markings. |
SA | Trigger Guard | C46025 | Type 1D | May/1940 to November/1940 | 40001 - 80000 | Milled, rear hole, no concentric ring. |
SA | Trigger Housing | D 28290 SA | Type 2B | April/1940 to October/1940 | 38001 - 75000 | Round hole, pad width 0.333 inch. |
SA | Trigger Pin | A13669 | N/A | January/1936 to December/1957 | 1 - 6100500 | |