How can the rifle pin be powered?
By the spring bolt internal power.
It is not a thimble.The first is the rifle is a manually loaded manually to the firing position. After firing, the propellant gas, make a step back to the firing position, it can proceed to the next round.
When the gun loaded ejector to excited state. Semi automatic and automatic rifles after a bullet, propellant gas bullets fired back automatically by gas system bolt, thimble back to the excited state
