DayZ field wiki · Gear
Fire mode
Safe, single, full
Short answer
A switch on the gun. Full auto in a house is how you announce a postcode. Single is a sentence.
Also: full auto · semi · selector
How it works
Fire modes exist on some rifles. The house is a single-shot room. Fields can be louder. Jams still happen.
What to do
Check the switch when you pick it up. Don't find out in a stairwell.
Don't
Don't spray a village because Kane laughed.