The Bofors 40mm gun is one of the outstanding designs in light artillery – it was originally designed in 1932, and is still in use today with only minor modifications (and much improved targeting controls). It uses a long recoil action and a sliding breechblock, and the WWII versions fired about 120 rounds per minute.
In the 40mm Bofors Vault page, we have added a very detailed Navy manual on the Bofors, describing the mechanism, firing procedure, disassembly, and maintenance.
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