The Swiss army has long been a militia trained and structured to rapidly respond against foreign aggression. Swiss males grow up expecting to undergo basic military training and a mandatory period of service in the Rekrutenschule (the "recruits-school"), the initial boot camp, after which Swiss men still remain part of the militia either in a home guard or reserve capacity until age 30 (age 34 for officers). Each such individual keeps his army-issued personal weapon (the Sig 550 5.56x45 mm assault rifle for enlisted personnel, and/or the SIG-Sauer P220 9 mm semi-automatic pistol for officers, medical and postal personnel) at home with a specified quantity of government-issued ammunition (50 rounds 5.6 mm / 48 rounds 9mm), sealed and inspected regularly to ensure that no unlawful use takes place. The emergency ammunition is the only ammunition that requires accounting for during inspections.[1]

From Wiki