IHC | Handguard Ferrule | N/A | Type 2 | January/1953 to December/1956 | 4400000 - 5278245 | Lip protruding .06 inches from rear barrel hole. |
IHC | Handguard Liner | B8893 | Type 4 | January/1953 to December/1956 | 4400000 - 5278245 | Unmarked. No front or rear hole. Notch is .70 inches wide by .15 inches deep. |
IHC | Lower Band | C46000 | Type 3 | January/1953 to December/1957 | 4400000 - 5278245 | Stamped flat profile with no groove or scallops. Unmarked. |
IHC | Lower Band Pin | N/A | Type 2 | January/1953 to December/1956 | 4400000 - 5278245 | Roll pin. |
IHC | Operating Rod | 6535382 IHC | 10 | December/1955 to December/1956 | 5100000 - 5278245 | Straight bolt lug, 5/16 radius cut, flat side, marking on bottom. May have a letter marking below drawing number on late production. |
IHC | Operating Rod | D-6535382 IHC | 10 | January/1953 to December/1954 | 4400000 - 4660000 | Straight bolt lug, 5/16 radius cut, flat side, marking on bottom |
IHC | Operating Rod | D6535382 IHC | 10 | January/1954 to December/1955 | 5000501 - 5150000 | Straight bolt lug, 5/16 radius cut, flat side, marking on bottom |
IHC | Operating Rod Catch Assembly | C46027 | Type 2 | January/1953 to December/1956 | 4400000 - 5278245 | Early unmarked, later marked "B,C,F,G,H, or I". Right fork 0.10 in wide and Left fork 0.07 in wide, width at accelerator rivet 0.79 in. |
IHC | Operating Rod Spring | SA14675/B147658 | N/A | January/1953 to December/1956 | 4400000 - 5278245 | Round cross section. |
IHC | Rear Hand Guard | C46024 | Type 2 | January/1953 to December/1956 | 4400000 - 5278245 | Operating rod clearance cut on right rear. |
IHC | Rear Sight Base | C46001 | Type 2 | January/1953 to December/1956 | 4400000 - 5278245 | may be stamped "A" or "C" |
IHC | Rear Sight Cover | B8872 | N/A | January/1953 to December/1956 | 4400000 - 5278245 | Similar to Type 2 SA. |
IHC | Rear Sight Lock Nut | N/A | Type 3 | January/1953 to December/1956 | 4400000 - 5278245 | Windage knob nut. |
IHC | Receiver | D6528291-C | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Receiver | D6528291-D | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Receiver | D6528291-G | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Receiver | D6528291-H | N/A | January/1953 to January/1953 | 4400000 - 4660000 | |
IHC | Receiver | D6528291-I | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Receiver | D6528291-J | N/A | January/1954 to December/1954 | 5000501 - 5278245 | |
IHC | Receiver | D6528291-L | N/A | January/1954 to December/1954 | 5000501 - 5278245 | |
IHC | Receiver | D6528291-M | N/A | January/1954 to December/1954 | 5000501 - 5278245 | |
IHC | Receiver | D6528291-N | N/A | January/1954 to December/1954 | 5000501 - 5278245 | |
IHC | Receiver | D652891-42 | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Receiver | D652891-43 | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Receiver | IHC F 6528291 | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Receiver | IHCD652891-A | N/A | January/1953 to December/1953 | 4400000 - 4660000 | |
IHC | Safety | C46015 | Type 3D | January/1953 to December/1954 | 4400000 - 4660000 | marked "IHC" on right side, tooling hole. |
IHC | Safety | C46015 | Type 3E | January/1954 to December/1956 | 5000501 - 5278245 | marked "F" on right side, tooling hole. |
IHC | Stacking Swivel Screw | B8891 | N/A | January/1953 to December/1956 | 4400000 - 5278245 | |
IHC | Stacking Swivel Screw | N/A | N/A | January/1953 to December/1956 | 4400000 - 5278245 | |
IHC | Stock | D35647 | Type 2C | January/1953 to December/1954 | 4400000 - 4499000 | .81/.81 butt stock holes, 1.75 inch channel, Straight clip latch relief, .44 Ordnance Wheel on left or right side. Julian date stamped in barrel channel. |
IHC | Stock | D35647 | Type 2C | January/1954 to December/1956 | 4450000 - 5728245 | .81/.81 butt stock holes, 1.75 inch channel, Straight clip latch relief, DOD Acceptance Stamp(.50x.50). Julian date stamped in barrel channel. |
IHC | Stock Ferrule Assembly | C40613 | Type 2C | January/1953 to December/1956 | 4400000 - 5278245 | 2 piece stamped steel/brazed construction. 0.190 inch hole at bottom of U shaped channel. |
IHC | Trigger | C46020 | Type 2 | January/1953 to December/1956 | 4400000 - 5278245 | No tooling hole. No markings. |
IHC | Trigger Guard | C7312631 | Type 2B | January/1953 to December/1956 | 4400000 - 5278245 | Stamped, tab hook. No markings. |
IHC | Trigger Housing | 6528290 IHC | Type 1B | January/1954 to December/1956 | 5000001 - 5278245 | Cloverleaf hole, pad width 0.205 inch. May be marked with letter code. |
IHC | Trigger Housing | IHC D6528290 | Type 1A | January/1953 to December/1954 | 4400000 - 4660000 | Cloverleaf hole, pad width 0.205 inch. May be marked with letter code. |
IHC | Trigger Pin | A13669 | N/A | January/1953 to December/1957 | 4400000 - 5278245 | Head may be punch marked. |
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 | |