The 3Gun trigger doesn't really have a wall that it breaks through at all. It just sort of rolls right through the entire pull. The length of the pull and the reset are both super short. A lot of guys report getting doubles with that trigger if you're not careful.
Viking Tactics sells it as the Super-V trigger with 4.5# springs instead of the standard 3.5# springs, which supposedly helps with the doubling issue. Or Geissele will usually ship you new springs if you want.
