percussion lock

a gunlock on a firearm that fires by striking a percussion cap.
Compare flintlock.

1820–30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
percussion lock
a gunlock in which the hammer strikes a percussion cap

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
The percussion lock was the next improvement in the ignition system after the flintlock.
There is no derange- ment of aim, in consequence of hanging fire, with a percussion lock.
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