Hammer (firearms)
Part of a firearm / From Wikipedia, the free encyclopedia
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The hammer is a part of a firearm that is used to strike the percussion cap/primer, or a separate firing pin,[1] to ignite the propellant and fire the projectile. It is so called because it resembles a hammer in both form and function. The hammer itself is a metal piece that forcefully rotates about a pivot point.[2]
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The term tumbler can refer to a part of the hammer or a part mechanically attached to the pivot-point of the hammer, depending on the particular firearm under discussion (see half-cock). According to one source the term tumbler is synonymous with hammer.[3][4]