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 | D28287-12SA | 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 | B4B | March/1942 to December/1944 | 498217 - 3359159 | |
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 | S-04<> | November/1942 to December/1944 | 940251 - 3359159 | <> 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. |
SA | Bolt | D28287-12SA | W10A | March/1942 to December/1944 | 498217 - 3359159 | |
SA | Bolt | D28287-19SA | A-5 | January/1945 to January/1945 | 2420192 - 3450503 | |
SA | Bolt | D28287-19SA | A-7 | January/1945 to January/1945 | 2420192 - 3450503 | |
SA | Bullet Guide | B8875 | Type 4 | May/1944 to October/1945 | 2850001 - 3888999 | Stamped steel, wide slot. Not marked. Top end folded back and formed. |
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 2 | November/1943 to December/1957 | 2110000 - 6100500 | |
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 3 | August/1942 to June/1945 | 800000 - 3800000 | Long with 8-36 NF thread, with locking bar. |
SA | Elevation Knob | N/A | Type 1C | September/1942 to October/1945 | 850000 - 3888081 | Knurled rim, 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 2 | December/1941 to December/1957 | 425001 - 6100500 | Half round cross section. |
SA | Follower and Slide | N/A | Type 2D | October/1943 to March/1945 | 2000001 - 3650000 | Marked with "12". |
SA | Follower Arm | B8869 | Type 4 | July/1941 to October/1945 | 290001 - 3888999 | No bevel, rounded follower arm pin lugs. May ahve raised "S" marking as well as number stamped indicating drop forge used. |
SA | Follower Arm Pin | A13667 | Type 2 | December/1941 to October/1945 | 429001 - 3888999 | 0.15 in rebate at end, 0.07 in at top. |
SA | Follower Rod | C64331 | Type 5 | January/1944 to December/1957 | 2500001 - 6100500 | Stamped sheet metal. Long fork plate riveted. No marking. Grooves/knurls eliminated. |
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 3 | March/1943 to December/1957 | 1360001 - 6100500 | Non-rebated head. Head may be smooth or knurled. |
SA | Gas Cylinder | D35449 | Type 2C | May/1943 to December/1957 | 1600001 - 6100500 | .575-.580 inch front sight base, flat top on rear ring, unmarked. |
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) | B7310079 | Type 3 | January/1944 to December/1957 | 2500001 - 6100500 | Return poppet valve, cross shaped slot. Various markings observed: "B S", "O", "P", small hexagon "P", large hexagon "P", "P" with crescent moon, "PBV", "P O", "P X", small triangle "P", large triangle "P", "T", "T A", "T O", "T PAX" and octagon. |
SA | Hammer | C46008-5 SA | Type 2D | June/1943 to August/1944 | 1630001 - 3100000 | Drawing number on face, late hooks, no 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 | Hammer Spring Plunger | B8880 | Type 2 | March/1944 to December/1957 | 2700000 - 6100500 | 1.50 inches long, "wingless" head, 0.40 inches wide. |
SA | Handguard Clip | N/A | Type 3 | August/1942 to December/1957 | 800001 - 6100500 | Stamped steel, flat profile, no groove. |
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 3 | June/1943 to December/1957 | 1650001 - 6100500 | Stamped flat 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 9 SA | 6 | December/1943 to January/1945 | 2250001 - 3450000 | Straight bolt lug, no radius cut, curved side, marking on bottom |
SA | Operating Rod Catch Assembly | C46027 | Type 2 | July/1942 to December/1957 | 700001 - 6100500 | Unmarked. Right fork 0.10 in wide and Left fork 0.07 in wide, width at accelerator rivet 0.79 in. |
SA | Operating Rod Spring | SA14675/B147658 | N/A | December/1940 to December/1957 | 160001 - 6100500 | Round cross section. |
SA | Rear Hand Guard | C46024 | Type 2 | March/1941 to December/1957 | 200001 - 6100500 | Operating rod clearance cut on right rear. |
SA | Rear Sight Base | C46001 | Type 2 | October/1940 to December/1957 | 75001 - 6100500 | No "C46001" stamped on the flat underside, machined with a "squared" off area behind hole for elevation/windage knob shaft. No concentric ring around hole for elevation pinion/windage knob assembly. |
SA | Rear Sight Cover | B8872 | Type 2 | December/1940 to December/1957 | 95001 - 6100500 | No drawing number marked. Reinforcing indentations on top and edges. |
SA | Rear Sight Lock Nut | N/A | Type 2C | January/1944 to October/1945 | 2500001 - 3890000 | Locking bar, long pinion, 8-36NF thread, with squared ends and squared binding ridges. |
SA | Receiver | D28291-34 | N/A | May/1944 to July/1944 | 2850001 - 3000000 | |
SA | Safety | C 26015 | Type 3C | October/1943 to December/1957 | 2000001 - 6100500 | Rounded upper side and top,tooling hole, marked "SA-11", marking has several observed variations |
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 2C | September/1943 to March/1945 | 1978000 - 3627000 | .81/.81 butt stock holes, 1.75 inch channel, Straight clip latch relief, S.A./G.A.W.(with .437 Ordnance Wheel,.188 Ordnance Wheel on bottom of pistol grip) |
SA | Stock Ferrule Assembly | C40613 | Type 3C | March/1942 to December/1957 | 510001 - 6100500 | 2 piece stamped steel/grazed construction. 0.190 inch hole at bottom of U shaped channel. |
SA | Trigger | C46020 | Type 2 | November/1940 to December/1957 | 80001 - 6100500 | No tooling hole. No markings. |
SA | Trigger Guard | C46025 | Type 1G | December/1941 to July/1944 | 425001 - 3000000 | Milled, rear hole. May show various inspectors numbers or initials. No Markings. |
SA | Trigger Housing | D28290-12-SA | Type 8 | December/1942 to November/1944 | 1010001 - 3300000 | Cloverleaf hole, pad width 0.156 inch. |
SA | Trigger Pin | A13669 | N/A | January/1936 to December/1957 | 1 - 6100500 | |