This gun-like sound effects circuit is based on the PLL4066. The circuit was found in the December 1989 issue of Radio Electronics magazine and already includes a small amplification stage.
Today we have more compact solutions. This is from a Radio Electronics magazine from October 1990....
This circuit is from an 80's documentation, making use of PUTs that are not currently common...
This circuit multiplies the input voltage by 3 and can work with up to 12 V input. The current is a few...