Welcome from South Florida.Which should I get? The Standard or extended length .40 to 9mm conversion Barsto barrel for my ss p229 Elite? I've already done the Armory Craft flat trigger and Grayguns master spring kit (19 lb. hammer spring). I also lightly smoothed some rough internal parts and frame areas. Trigger is now as it should have come from the factory.
Appearance wise,it has factory green scorpion grips on it. The pistol wil not be carried. I have others for that. This is a fun gun.
It all depends on your intended use of your gun.
Concealed carry ? The extra length might not be good.
Looks ? Very personal choice.
Extended with ported barrel ? Might control muzzle flip. Choice of 3 different cross cuts.
Threaded barrel ? Are you planning to buy a silencer ?
Accuracy ? Extra length might or might not improve a quality barrel.
I think it it your choice.