WRA | Aperature | B8868-1 | Type 1 | December/1940 to January/1945 | 100101 - 2540999 | Parkerized stamped steel. May have punch mark on bottom surface. 60 degree crosshatch pattern on face. No tracks on either side of gear. |
WRA | Aperature | B8868-1 | Type 2 | January/1945 to June/1945 | 1600000 - 1640000 | WIN13 series. Same as Type 1 with exception to tracks cut on either side of teeth. |
WRA | Barrel | D35448W.R.A. | N/A | December/1940 to May/1942 | 100101 - 165500 | Markings on top right. No date of manufacture present. |
WRA | Barrel | D35448W.R.A. | N/A | May/1942 to June/1945 | 165501 - 2540999 | Markings on top left. No date of manufacture present. |
WRA | Bolt | D28287-1W.R.A. | N/A | June/1941 to June/1945 | 110001 - 2540999 | Extractor post hole and hole on bottom of bolt. |
WRA | Bolt | D28287-1WRA | N/A | December/1940 to June/1941 | 100101 - 110000 | Extractor post hole only. No hole in bottom of bolt. |
WRA | Bullet Guide | B887 | Type 2A | June/1942 to January/1945 | 1204192 - 2540999 | Forged and milled. Wide slot. Marked "CM". |
WRA | Bullet Guide | B8875 | Type 1A | December/1940 to May/1942 | 100101 - 1030000 | Forged and milled. Narrow slot. Marked "BB8875W.R.A." |
WRA | Bullet Guide | B8875 | Type 2B | June/1942 to January/1945 | 1204192 - 2533000 | Forged and milled. Wide slot. Marked "A". |
WRA | Bullet Guide | B8875 | Type 2C | June/1942 to January/1945 | 1204192 - 2533000 | Forged and milled. Wide slot. Punch marked. |
WRA | Bullet Guide | B8875 | Type 2D | January/1945 to June/1945 | 1600000 - 1640000 | Forged and milled. Wide slot. Marked "8" or unmarked. WIN-13. |
WRA | Bullet Guide | B8875 | Type1B | May/1942 to June/1942 | 1030001 - 1065000 | Forged and milled. Narrow slot. Punch marked. |
WRA | Buttplate Assembly | C41012 | Type 1 | December/1940 to April/1942 | 100101 - 160000 | No cap, 4 checks in top row |
WRA | Buttplate Assembly | C64283 | Type 2 | April/1942 to June/1945 | 160001 - 2540999 | May be marked inside "2S". Cap, 12.5 squares in vertical row intersecting screw hole. |
WRA | Clip Ejector | C46018 | N/A | December/1940 to June/1945 | 100101 - 2540999 | Early were blued, late were parkerized. |
WRA | Clip Latch | C46011 | Type 1B | December/1940 to June/1945 | 100001 - 1640000 | Rounded front end, unmarked, punch mark |
WRA | Clip Latch | C46011 | Type 1C | January/1943 to June/1945 | 1280000 - 2540999 | Rounded front end, many but not all marked "CM" |
WRA | Clip Latch | C46011 | Type 1D | May/1943 to June/1945 | 1333683 - 2540999 | Rounded front end, many but not all marked "A" on outside |
WRA | Clip Latch Pin | N/A | N/A | December/1940 to June/1945 | 100101 - 2540999 | 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. |
WRA | Clip Latch Spring | N/A | N/A | December/1940 to June/1945 | 100101 - 2540999 | 0.03 inch steel wire, 5 coils, outside diameter 0.26 inch. White finish is original, Parkerized indicates refinishing. |
WRA | Elevating Pinion | N/A | Type 1 | December/1940 to January/1943 | 100101 - 1280000 | Short with 6-40NF thread, with flush nut. Early examples (to circa 46,000-47,00) were marked inside with the part number. |
WRA | Elevating Pinion | N/A | Type 3 | January/1943 to June/1945 | 1280000 - 2540999 | Long with 8-36 NF thread, with locking bar. |
WRA | Elevation Knob | N/A | Type 1A | December/1940 to June/1945 | 100101 - 1240000 | Checkered rim, early closed arrowheads. Later open arrowheads more common. |
WRA | Elevation Knob | N/A | Type 1C | September/1942 to June/1945 | 1240001 - 2540999 | Knurled rim, open arrowheads |
WRA | Extractor | N/A | N/A | December/1940 to June/1945 | 100101 - 2540000 | Blued throughout production. Punch marked. |
WRA | Extractor Spring and Plunger | B8886 | N/A | December/1940 to June/1945 | 100101 - 2540999 | Early may be blued. |
WRA | Firing Pin | B8879 | Type 1 | November/1940 to May/1942 | 100101 - 1200000 | Round cross section. May have rougher finish and punch mark. |
WRA | Firing Pin | B8879 | Type 2 | May/1942 to June/1945 | 1200001 - 2540999 | Half round cross section. May have rougher finish and punch mark. |
WRA | Follower and Slide | N/A | Type 1D | December/1940 to November/1943 | 100101 - 2340000 | Marked with "CM", not all are marked. |
WRA | Follower and Slide | N/A | Type 2A | November/1943 to December/1944 | 2340001 - 2533000 | Punch marked, not all are marked. |
WRA | Follower and Slide | N/A | Type 2C | November/1943 to December/1944 | 2340001 - 2533000 | Marked with "11", may be punch marked. |
WRA | Follower and Slide | N/A | Type 2E | January/1945 to June/1945 | 1600000 - 1640000 | Marked with "13", may be punch marked. |
WRA | Follower Arm | B8869 | Type 1 | December/1940 to January/1941 | 100101 - 100501 | Unmarked. Single triangular bevel on right side. |
WRA | Follower Arm | B8869 | Type 3 | February/1941 to June/1945 | 100502 - 2540999 | Unmarked. Single shallow bevel on left side above pin hole. Follower arm lugs were rounded. Might show rough machining, punch mark and/or "6,8,or 9" to indicate drop forge number. |
WRA | Follower Arm Pin | A13667 | Type 2 | December/1940 to June/1945 | 100101 - 2540999 | 0.15 in rebate at end, 0.07 in at top. |
WRA | Follower Rod | C46014 | Type 1B | December/1940 to March/1941 | 100101 - 102000 | No drawing number on rod. Short fork. 14 vertical knurls, round behind shoulder. Used with compensating spring. |
WRA | Follower Rod | C64331 | Type 3A | March/1941 to August/1941 | 102001 - 120000 | Forged, one piece. Flat profile, 14 vertical knurls. Short fork. Drawing # not marked. |
WRA | Follower Rod | C64331 | Type 3B | August/1941 to December/1944 | 102001 - 2533060 | Forged, one piece. Flat profile, 14 vertical knurls. Short fork, marked "CM". Bevels on sides of lower fork prong. WAS NOT USED BETWEEN SERIAL #s 1600001 to 1640000 (WIN-13). |
WRA | Follower Rod | C64331 | Type 3C | August/1941 to December/1944 | 120001 - 2533060 | Forged, one piece. Flat profile, 14 vertical knurls. Short fork, marked "A". Bevels on sides of lower fork prong. WAS NOT USED BETWEEN SERIAL #s 1600001 to 1640000 (WIN-13). |
WRA | Follower Rod | C64331 | Type 3D | December/1944 to January/1945 | 2533001 - 2534232 | Forged, one piece. Flat profile, 14 vertical knurls. Short fork, punch marked. WAS NOT USED BETWEEN SERIAL #s 1600001 to 1640000 (WIN-13). |
WRA | Follower Rod | C64331 | Type 5 | January/1945 to June/1945 | 1600001 - 1640000 | WIN-13. Stamped sheet metal. Long fork plate riveted. No marking. Grooves/knurls eliminated. Punch marked or stamped with "A". |
WRA | Front Hand Guard | C64245 | N/A | December/1940 to June/1945 | 100101 - 2540999 | |
WRA | Front Site | B147427 | Type 3B | December/1940 to June/1945 | 100101 - 2540999 | 0.812 inches wide at blades. Punch marked. |
WRA | Front Site Screw | N/A | Type 2 | December/1940 to June/1945 | 100101 - 1300000 | Rebated Allen socket head, used with seal. |
WRA | Front Site Screw | N/A | Type 3 | March/1943 to June/1945 | 1300001 - 2540999 | Non-rebated head. Head may be smooth or knurled. |
WRA | Gas Cylinder | D35449 | Type 2B | October/1941 to December/1943 | 125001 - 2350000 | .50 inch front sight base, no flat top on rear ring, unmarked. Not for WIN-13 (1,6XX,XXX - 1,64X,XXX). |
WRA | Gas Cylinder | D35449 | Type 2C | December/1943 to June/1945 | 2350001 - 2540999 | .575-.580 inch front sight base, no flat top on rear ring, unmarked. Includes WIN-13 (1,6XX,XXX - 1,64X,XXX). |
WRA | Gas Cylinder | D35449W.R.A. | Type 2A | December/1940 to October/1941 | 100101 - 125000 | .50 inch front sight base, no flat top on rear ring, marked "D35449W.R.A." on right side of rear ring. |
WRA | Gas Cylinder Lock | B147426 | Type 1 | December/1940 to June/1945 | 100001 - 2540999 | Front face chamfered,no hump, unmarked. 1.225 - 1.335 inches high. may be punch marked and have machining marks on face. |
WRA | Gas Cylinder Lock Screw(Plug) | B147428 | Type 1 | December/1940 to January/1945 | 100001 - 2540999 | Single slot, no poppet valve. May be punch marked or have machining marks on face. |