| 1947 REMINGTON ARMS INC Breech Bolt Lock Firearms |
| 1949 COLT S Breech Mechanism Automatic Firearms |
| 1859 ALTMAIR Breech Loading Firearms FAXON Patent 11689 |
| 1949 GEORGE Breech Mechanism Automatic Firearms |
| 1965 ERMA WERKE WAFFEN MASCHF Breech Closure Firearms |
| 1952 CLARKE Breech Bolt Lock Actuator Firearms |
| 1955 HARVEY Breech Bolt Lock Automatic Firearms |
| 1860 WAMPLER Breech Loading Firearms Patent 11788 |
| 1961 ERWIN Cocking Breech Mechanism Automatic Firearms |
| 1947 WILLIAM Breech Bolt For Firearms Patent |
| 1876 FASOLDT Breech Loading Firearms Patent 11651 |
| 1924 RONNINGEN Breech Protector Firearms Art |
| 1955 GILDO MARCATI Breech Block Firearms Art |
| 1931 J E BROWNING Breech Mechanism Firearms Art |
| 1955 ANTONIO Breech Block For Firearms Patent |
| 1945 HUMESTON Breech Closing Means Selfloading Firearms |
| 1932 VON Breech Bolt Automatic Firearms Art |
| 1947 LOOMIS Breech Bolt Lock For Firearms Patent |
| 1952 WALKER Breech Closing Construction Firearms |
| 1966 BENSON Breech Bolt Mechanism Bolt Action Firearms |
| 1953 PETERS Breech Mechanism For Firearms Patent |
| 1963 MCKINLAY Locking Type Safety Breech Plug Firearms |
| 1965 JOSEF Breech Closure For Firearms Patent |
| 1920 GRANT Breech Bolt Lock For Firearms Patent |
| 1945 ELIZABETH Breech Mechanism Firearms Art |
| 1944 SWARTZ Breech Mechanism Automatic Firearms |
| 1942 GEORGE Breech Mechanism Automatic Firearms |
| 1944 DE Breech Mechanism Automatic Firearms Art |
| 1944 JOSEF Breech Device For Firearms Patent |
| 1947 DELSOLE Extractor Breech Bolt Assembly Firearms |
| 1960 FRIEDRICH Breech Mechanism Automatic Firearms |