And even if you cannot carry a gun with you all the time, if you get into a fight with someone, people are either:
A) Mr Asshole that has been into fights every other day of his life. He doesn't care a bit about your sorry ass, so he will use weapons, bottles or anything within reach. No Gym-Martial-Artist without real fight experience will stand against someone that hast street-fighting experience in a street fight.
B) Mr Wanna-be, who has done Fung-Shoo-Jitsu for 120 years and has the 30th black belt degree and a certificate with the malayo-chinese master's autograph on his wall. He will stand through three blows, then mumble a low "that's not in the book!" and get knocked out.
So f-ing true!!! I love the guys who talk shit and you tell them to shut it just to have them reply "try it tough guy, I'm a (enter number here) degree blackbelt in (enter martial fart here)" and before he can even finish the sentence pop him right in the forehead and watch his ass crumble to the ground unconscience.
Where I come from there is no "locks"..you keep swinging till they stop moving or someone pulls you off them..period. Hence why its so important to make sure you are acting like self defense cause one you start don't stop till you're made to.
Key to survival in reallity is knowing when NOT to fight. I don't care if you are MMA expert, if there are 3 douches trying to start a fight back down...if someone with a gun / knife trying to rob you give them your shit...at least till the turn to run then pull your .40, yell stop or I'll shoot and hope he turns just enough that you can double tap him center mass....but then again is that even realistic?
Good decisions will secure your survival the majority of the time.