New 642 without the lock its a done deal, it was really simple taking off the sideplate and disabling the lock was even simpler. BTW I ended up stripping the whole pistol and let me tell you that spring for the hand is a bugger, I had to download a schematic to figure it out. That lock is never gonna work again and from looking at the gun you would never know its been disabled , test fired it with the lock engaged and it still fires and didnt even make a scratch on it