I don't know of any sights available for this gun unless you get the fiber optic oem one for the front. At least I think one of the models has a FO. Blackwood, or equinox maybe?
But IMO these have the best sights of any small gun. I love them.
As for trigger pull, you can get a reduced power hammer spring and get a flat trigger from several vendors. After that and a bunch of polishing of the parts my buddy got mine down to about 4.75# . But beware, the trigger install is a bit of a pain.
I think that the stock sights on my P238 are optimal, given the nature of the pistol. As for trigger pull, I suggest that you send the pistol to Robert Burke, TheSigArmorer. He'll get the pull weight down to 4-1/2 lbs, with other improvements too.
Just search for Sig sights. TruGlo has some nice ones. There are others. Note they are numbered. i.e. #6 or #8. Replace like with like unless you're trying to change POI. Sight pusher or gun smith job depending on your confidence and experience.
A forum community dedicated to SIG Sauer Pistols and SIG Sauer Rifles owners and enthusiasts. Come join the discussion about optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!