Traditions™ & CVA™ Flintlock Mainspring - A1720Traditions Flintlock Mainspring is the universal mainspring replacement in Traditions and CVA sidelock and flintlock muzzleloader rifles. Made from steel, the mainspring powers the hammer by pressing against the tumbler and rotating the hammer with a great deal of force. The sear engages the tumbler when the gun is cocked while holding the force of the mainspring. When the trigger is pulled, it pushes the sear enough to release the tumbler, allowing