so your arm is extended, and someone tries to grab your gun and push it to the left, what do you do? (besides intuit their movement and squeeze the trigger before they get there?!)
if an opponent grand the slide and/or barrel of your gun, he will by definition have superior leverage initially.
Again, why do we think that roy Rogers white hat cowboys should only carry one weapon?
Tenkan, present your second weapon and quickly dispatch the opponent. Yippie Taiyo Kai ye.