Revolvers lacking an external hammer, often termed “hammerless” or more accurately “shrouded hammer,” operate by concealing the hammer within the frame. This design prevents the hammer from snagging on clothing or other objects, enabling a swift and smooth draw. A trigger pull, often longer and heavier than on traditional revolvers, both cocks and releases the internal hammer, firing the cartridge. Two primary mechanisms achieve this: a double-action-only system where every trigger pull performs both actions, and a double-action/single-action variant where the first shot is double-action, while subsequent shots can be single-action with a lighter trigger pull after manually cocking the internal hammer (if accessible). Some designs utilize a transfer bar safety system, preventing accidental discharge unless the trigger is fully depressed.
The concealed hammer provides a significant advantage for concealed carry, reducing the risk of accidental discharge and facilitating a faster draw from concealment. Historically, these designs addressed safety concerns with early revolvers prone to accidental firing. This practicality has ensured their enduring popularity among individuals prioritizing self-defense. Beyond concealed carry, the streamlined profile can also improve accuracy for some users by reducing the chance of the hammer interfering with the sight picture.
