Well, I remember a TV show about hunting that proved one can effectively disable a shotgun-toting madman by sticking a carrot in the barrel of the gun, so that when the trigger is pulled, the breech end of the gun explodes, leaving the madman powder-burned and boggled.
Then again, it merely proved that this tactic works for wascally wabbits.
You can grab the cylinder of a double-action revolver and prevent it from being fired. The assailant can’t cock and fire the revolver if the cylinder isn’t free to rotate.
Another technique is to try to jam the revolver by grabbing it in the area of the hammer. To either prevent the hammer from being cocked or to get the web of your hand in between the hammer and firing pin.
I took Hap Ki Do in college, and one of the things we were shown, as a last resort, was a move similar to this. However, we pushed in the opposite direction: you start by putting a hand on the forearm and pushing the back of the gun hand with your other hand. This rotates the wrist inward toward the gun-holder, putting them in the line of fire. Then your hand slides forward and continues rotating the gun toward the holder’s wrist until it comes out of their hand. Then the punching and kicking commences.
Sorry, bad writing on my part. I mean to say “nobody said stop the gun from firing vs evasion.” In other words, this is not a discussion of should I try to hold the revolver chamber still INSTEAD of something else.
From several years of martial arts experience, I second this. I’ve seen and been taught many different gun defence scenarios. Ones that rely on somehow disabling the gun mechanism are complete crap. Simply, any sort of effectiveness means training repeatedly on the specific type and model of firearm you would supposedly be disabling, and gambling that any assailant would conveniently have a style of weapon that could be disabled. That means, you have to tell in a dark alley under stress instantly what style of gun someone has. The situation can further be spoiled with different grips that your assailant has on the gun, where he’s pointing it, etc. Waaaaay to many uncontrolled variable to ever bet your life on.
Simply, a quick deflection of the barrel will always be faster than a more complex maneuver. This solves your immediate problem, which is that a gun can only hurt you if it is pointed at you. Everything else after that initial deflection is what really matters.
The best way I’ve seen is:
Deflect
While maintaining some sort of bridge so that the gun won’t get re-pointed at you, go for the eyes, throat, neck, of your assailant with the ferocity of a rabid pit bull.
In short, while it may be technically possible to disable the gun, it’s easier, faster, and more effective to get the gun pointed somewhere else and disable the attacker instead. And then run away. So yeah, trying to disable the weapon is stupid.
When I saw this thread I knew that the Beretta BS would come up!, in order to “simply” pull the slide off of a Beretta you must:
Unload the gun (the slide will not come off while the gun is loaded).
Push in the button on the side of the slide and flip the takedown lever while holding the button in.
This HAS NEVER! been done (except in Hollywood) and attempting this “technique” IRL will get you shot.