So first thing. I do carry my edc locked and loaded when leaving the range. I've gotten into arguments about that with people that consider it 'a safe place', as if that exists or ever has.3 men rush you at the entrance armed with AR's/AK's intent on robbing the place. They push you back inside at gun point, then tell you to stand at a certain location and not move. They proceed to threaten the gun clerk/employees who one of the them then rounds them up into a corner of the shop where he'll watch them while the other two get to grabbing the good stuff.
What ya going to do, you're armed with your EDC.
Wait for an opening and try to take all 3?
Make no plan to affect their demise as waiting could lead to your own demise for doing nothing?
Wait until one of them actually is about to shoot you, then draw out of desperation/last ditch effort to save yourself?
The second their attention is not directed at you, draw and fire on all 3 of them?
What ya got up your sleeve for self rescue, you're armed up, amped up/life is in imminent danger of grave bodily harm or death.
Is this scenario survivable if they are intent on killing all witnesses?
Meek, mild and compliant. I may drop to my knees and beg for mercy.
I'll start shooting tangos in the back at the first opportunity.