flash gap

Due to this the material in the flash gap is subjected to high pressure.

Again the "flash gaps" between the panels are of solid mahogany.

Horizontal joints Black laminate shadow line flash gap.

Non-gas seal revolvers have a small gap (known as a flash gap) between the cylinder and the barrel; the small gap between the cylinder and barrel is necessary to allow the revolver's cylinder to revolve, presenting a new, loaded chamber for firing.