[Drew68]

Correct, they are not electrically fired; they are mechanically fired through a firing pin to a primer.

They are electrically fired. These weapons do not have firing pins. The have firing contacts. Energized through an electrical connection, the contact touches the primary as it cycles past and initiates it. Release the trigger and the contact is de-energized.

[Drew68]

primary

I don't know why my useless spell check keeps changing primer to primary.

[CodeToad]

Thanks, Drew. That would be an electrically fired primer.