Leaf-type mainspring inside a flint lock.


Coil-type mainspring, coaxially-mounted around the firing pin (inside the bolt) of a Mauser 98 bolt-action rifle .


  Coil-type mainspring, powering the concealed hammer inside a Browning Citori action.




Mainspring - The spring in a firearm (either leaf or coil type) which powers either the hammer, or the firing pin directly, to strike the priming charge and fire the gun.



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