It is the part of the action that holds the hammer or striker under tension until the trigger is pulled, at which point it releases the mechanism to fire the cartridge. Double-Action Sear Systems In a single-action system, the sear is responsible only for releasing the hammer, as the hammer is manually cocked for every shot.
The Sear's Role in Energy Transformation
Over time, the high-stress contact points of a sear will experience wear, particularly the contact angles and edges. When a firearm is cocked, the hammer or striker is pulled to the rear, engaging with a specific groove or notch on the sear.
This diversity in design highlights the sear's role in tailoring a firearm's function to its specific application. At its core, a sear is the critical contact point where controlled energy transformation happens in a firearm.
The Sear's Role in Energy Transformation
Consequently, the sear in a double-action revolver is built to be robust and is often adjustable to manage the increased stress and ensure a consistent, albeit longer, trigger pull. This wear can alter the trigger pull, making it lighter or, more dangerously, causing it to creep as the hammer begins to move before the trigger reaches the break point.
More About What is a sear
Looking at What is a sear from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on What is a sear can make the topic easier to follow by connecting earlier points with a few simple takeaways.
