Rifled Breech Loader - Bofors Ogival Screw

Bofors Ogival Screw

Also in the early 1890s, Arent Silfversparre of Bofors invented an ogival screw breech, similar to the Armstrong model in the way it eliminated the need to withdraw the screw before swinging it to the side. Bofors continued to use this in medium artillery into the 20th century.

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