Poppers

Poppers are the colloquial name given to an older Earth That Is firearm ignition technology. Poppers use a small "pocket" in the back of the round that is quickly crushed by the hammer of the gun, setting off the main charge. They were never reliable and they could, on rare occasions, go off with rough handling. Popper weapons are rather easily distinguished by either an external hammer or plunger that is manually reset each shot. At this point, it is rather difficult to get a hold of Popper ammunition since it was rather quickly replaced by Whizzer guns which were both more reliable and did not require special materials to reload.