[gundog]

Looks like you can still get electronic primers for the Remington Etronix rifle.

[wrench]

Electric matches, or as already mentioned, nicrome wire. Very easy to find.

[Paal Gulli]

"Looks like you can still get electronic primers for the Remington Etronix rifle."

That's not the only weapon that ever used electric primers. They're fairly common in military weaponry, like the M-230 chain gun and GAU-8 cannon.