.22 LR pistols are small, easily concealed, have a speed of 900 to 1300 fps, more then any .45, are easy to aim, have quick target aquisition, a quick and accuate grip, and are perfect for self defense. 3 to 5 rounds of .22 LR in the chest of any attacker will ruin an attack. In self defense one must teach confidence, peace of mind, ways to carry and conceal, grip, target acquistion, and so on. Take a poll. How many cops nationwide carry a 45 or 9 off duty? many, perhaps even most grab a .22, .380. .38 and stuff in in the waist band or pocket.