that looks to be the Springfield xd service which is the 4". i have the xd tactical which is 5" in 45 acp. my son at 15 years old shot a 10 round group of one ragged hole dead center with my xd. first time shooting it. that was at 7 yards. better than i can do. guess there is a plus side to those video games. its a very good weapon. it has the 2 "safeties" the one on the trigger and the back strap. i feel much more comfortable leaving one in the pipe with this set up. my carry piece a glock 30 in 45 doesn't have the back strap wished it did. With the double stack mag, striker (hammerless), reliability, 40 cal, and being a springfield its a great choice for home and personal defence.