Aikido & handgun defense go hand in hand. Enter, push gun against body & pull trigger.
Pivot, turn push gun against body & pull trigger. The New York police service analized all their shooting's, most happen at less than 3 feet. If you are carrying a pistol for self defence you must evade and counter defend or escape is perferable. FBI studies have shown that it is impossible to draw your firearm safely if a armed attacker is within 20 ft of you.