Is your safety "broke clear off" broke?
Or does it just not work right?
There is a big difference.
The factory MK-10 trigger assembly is adjustable, and if you mess with it, you also have to adjust the safety to work correctly again.
There are four screws on the trigger housing.
*Top Rear adjusts the Sear engagement.
*Bottom Rear adjusts the Over-travel.
*Top Front adjusts the Pull weight.
*And the Bottom Front adjusts the Safety to work right again, after you screw around with the first three.
rc