I believe this gun has the Short Reset Trigger and a Short Reach Trigger. Sig sells a trigger that the curved part (where your finger rests) is closer to the rear as opposed to the standard trigger, this does not apply to the short reset trigger. I have pulled on a few SRTs and this particular model didnt break until it almost touched the back of the guard.
Someone correct me if I'm wrong but I've seen the parts in the catalog.
Nov 2, 2011 sent form 4, SS Sparrow. Arrived May 29, 2012.
Jan 30, 2012 sent form 1 for SBR. Arrived July 12, 2012
Jan 22, 2013 Sent form 4, 762-SDN-6, check cashed Jan 25, 2013.