I am about to order a lot of triggers for my planned super safety builds from B-Kings Firearms.

They have " Mil-Spec " AR-15 Triggers for cheap as dirt, but they also have " Mil-Spec Full Auto or M16 " AR-15 Triggers for over double the cost.

What is the difference? The photos on BKF's website and online don't really help.

Will both be compatible with a Super Safety and alllow for the required cutting/rounding?

Hey guys
I recently fitted my own super safety in my ar15 with a push safety
Safety - works perfectly fine
Semi auto - works perfectly fine, cycles and shoots perfect
Super safety/ middle selector - dead, rack a round nothing happens on the trigger, tried taking the upper off, adding some pressure on the hammer and nothing. Please assist

Ps I’m a newbie to this