8-bit gun sound effects without extra hardware?

Using Arduino Audio
7

I haven't tested this, but this should make a half second long burst of noise on pin 3.

void noise()  {
unsigned long time = millis();
while(millis() - time <= 500)  {  // change "500" for different durations in ms.
tone(3, random(100, 1000);   // change the parameters of random() for different sound
}

I would just copy and paste the code I used, but it would not really make sense to use it outside the sequencer program, it would be a pretty kludgey way to do it.

Ooh, just realized the forum has a ninja'd warning!