I have pulled on a few SRTs and this particular model didnt break until it almost touched the back of the guard.
Thats not the SRT working, its where the trigger breaks. The SRT is what happens after you shoot a round, you only have to bring your finger back about 1/4 inch before the trigger resets and is ready to fire again. Sig also offers a trigger thats much thinner and has a shorter reach for people with smaller hands. Not to be confused with the SRT.