gatillo

Gatillo is a Spanish term that refers to the trigger of a device—the lever, button, or mechanism that initiates a process when activated. While most commonly associated with firearms, the concept applies to many other mechanisms that start an action in response to user input.

In the context of firearms, the gatillo releases the firing sequence. When pressed, it disengages the sear or another blocking mechanism, allowing the hammer or striker to strike the firing pin and ignite the cartridge. Firearms employ a range of trigger concepts, including single-action (where the hammer is cocked manually before firing), double-action (where pulling the trigger cocks and releases the hammer or striker), and double-action/single-action configurations (which combine both behaviors). Some modern pistols use striker-fired mechanisms instead of a traditional hammer; in these designs the trigger cocks and releases a spring-loaded striker in a single action per pull.

Trigger design also factors into safety and performance. Trigger pull weight, defined as the force required to actuate the trigger, varies by weapon type and intended use. A lighter pull can improve accuracy for some shooters but may increase the risk of accidental discharge if not managed properly. Many firearms integrate safety features such as firing-pin blocks, internal safeties, or manual safeties that interact with the trigger mechanism to prevent unintended firing.

Beyond firearms, gatillo or trigger mechanisms appear in various devices, where an input action—pressing a button, flipping a switch, or pulling a lever—begins a sequence of operations. The concept of a trigger is central to controlling timing, initiation, and safety across mechanical and electronic systems.