It won't let me vote for all 4 options. I have used all of them at one time or another.
Me, too, I also use them all, depending on the type of shooting I am doing and the pistol. Pros and cons for every type of sight.
Hi JosephI'd spend time with iron sights if for no other reason than learning to shoot iron sights is so very basic to pistol shooting, in general. Doesn't mean that you have to restrict yourself to just using iron sights, but as long as your vision is good (eyes are young ), spend some time with irons. Still the bread and butter sights for pistol work. I do well with iron out to about 25 yards, but my vision needs a little help beyond that. Most folks find red dots the easiest sight to use, especially if your eyes have trouble seeing open sights, clearly. No magnification with a red dot, so no steadiness issues as with a scope. Fast to get on target and so on. Lots of affordable choices for air pistols, too. With the right red dot, I can come very close to the same accuracy out to 50 yards as with a 2x pistol scope. Scopes and magnification will squeeze the most potential accuracy out of your pistol, especially at ranges where target visibility starts to wane. Learning how to use pistol scopes, effectively and comfortably, takes time and practice, though. There is a rather steep leaning curve involved, all the more so if you plan to use your pistol without a rest. With a rest, though, not as bad and for 50 yard work, you'll be able to use more than 2x. Riflescopes on a LR pistol like that are a definite option if you'll be shooting from a rest, though you'll reach a point where the scope is bigger than the gun and so on. With that gun, from a rest, at 50 yards and you want to print small groups? I'd be inclined to use a riflescope. Very much a personal call on this one, however.
BTW ...... This would be perfect in a Pistol Gate ..........