Though a good review of popular guns, the real best selling gun according to online gun seller gunbroker.com is the KEL TEC PMR-30, a small lightweight low kickback .22 semi automatic that sleekly holds 30 rounds of double stacked magnum ammunition in the magazine, a very good weapon for women, teens and senior citizens who need the fire power to shoot 30 people at a time. It is also easily handled and fired by toddlers.