 | | F41A | | Subclass index | | KINDS OF PROPULSION | 1/00 | | BREECH MECHANISMS | 3/00 | | UNLOCKING MECHANISMS | 5/00 | | GUN RECHARGERS, EXTERNALLY POWERED GUNS | 7/00 | | FEEDING OR LOADING, MAGAZINES | 9/00 | | ASSEMBLY FEATURES, MODULAR CONCEPTS, ARTICULATED OR COLLAPSIBLE GUNS | 11/00 | | COOLING, HEATING, VENTILATING, BLOWING TROUGH | 13/00 | | EXTRACTORS, EJECTORS | 15/00 | | SAFETY ARRANGEMENTS | 17/00 | | FIRING OR TRIGGER MECHANISMS, COCKING | 19/00 | | BARRELS, GUN TUBES, MUZZLE ATTACHMENTS | 21/00 | | GUN MOUNTINGS, e.g. on vehicles | 23/00 | | Permitting recoil | 25/00 | | Permitting elevation or traversing | 27/00 | | CLEANING OR LUBRICATING | 29/00 | | TESTING | 31/00 | | ADAPTATIONS FOR TRAINING | 33/00 | | OTHER ACCESSORIES OR DETAILS | 35/00 |
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