Blowback Operation
Definition
An operating arrangement without a mechanical breech lock, in which the design and inertia of moving components control opening during pressure evolution. Simple blowback is common in some handguns, but cartridge name or case-mark depth alone does not establish that mechanism.
Common semi-automatic handgun systems include simple blowback and locked-breech recoil operation, with other arrangements also possible. In simple blowback, resistance to opening depends importantly on moving-part inertia and the mechanism. A recoil spring is not a mechanical breech lock.
Related terms
- Locked Breech
- A mechanically engaged breech arrangement that remains locked during the initial firing phase before the design’s opening sequence. Short-recoil systems are common...
- Recoil Shield
- The rear supporting surface behind a conventional revolver cylinder that can contact a cartridge case during firing. It may contribute marks useful...
- Revolver
- A firearm with multiple chambers in a rotating cylinder that aligns a chamber with the barrel. Conventional designs retain fired cases until...
- Semi-Automatic Pistol
- A handgun designed to fire one shot per trigger operation and use an operating cycle to prepare the next cartridge. Functioning designs...
- Striker-Fired Mechanism
- A firing arrangement using a spring-driven striker rather than a hammer transferring impact to a separate firing component. Cocking and safety systems...