Boxlock action

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File:Boxlock action.gif
The side by side boxlock action, shown with the action open, hammers cocked, and hammer block safety on

The boxlock action is a hammerless action of a type commonly used in double barreled shotguns, dating back to 1875. The boxlock action was developed by Anson and Deeley, based on the earlier Westley Richards action. The boxlock action uses concealed, self-cocking hammers in a break-open action. Strongly opposed by most sportsmen and manufacturers at first, the boxlock action quickly became the dominant form of double barreled shotgun action.[1][2]


The boxlock action was the result of a long evolution of hammerless actions, created by two gunsmiths, Anson and Deeley, working for the Westley-Richards company in 1875. The contribution of Anson and Deeley was in the simple and elegant lock mechanism, which provided a hammerless action with fewer moving parts than exposed hammer models available at the time. This allowed a rugged and simple action which was faster to operate than exposed hammer guns. The original model, pictured above, used a hammer block safety, which was problematic, as it was possible for the gun to discharge when the safety was released. An 1882 improvement incorporated a trigger block safety, which was automatically engaged when the hammers were cocked. This type of automatic safety is still prevalent in modern boxlock actions.[3][4]

See also


  1. "Action, Boxlock". SAAMI.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. Daniel Coit Gilman, Harry Thurston Peck, Frank Moore Colby (1904). The New International Encyclopædia. Dodd, Mead and Company. p. 808. <templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  3. John Henry Walsh (1882). The Modern Sportsman's Gun and Rifle. Horace Cox. pp. 183–189.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  4. Dave Anderson (Feb 2002). "New Weatherby Firearms For 2001". Guns Magazine.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  • Henrotin, Gerard The Boxlock pistols explained,, 2009