Except that the in game sights are way bright for tritium-phosphorescent sights. Realistically, they should be essentially invisible in bright light (except for the usual white dots), and only faintly glowing in the dark (I’ll edit in pictures later to demonstrate). They’re more consistent with fiber-optic sights, but they’re still way too bright for that, and I’m not even sure that fiber-optic sights would have been available on anything in 80’s Sweden.
Circling back to the tier list thing though, I think you’ll find most weapons have the same kind of ‘okay, this one is good for this particular situation’ thing to them. The only ones I wouldn’t personally consider ever using once I have something else are the pump-action shotgun (I like the Sjöqvist far etter in almost every respect) and the Meusser hunting rifle (similarly, I feel the Älgstudsare is better in pretty much every respect), but even those are likely to be situationally useful for some people beyond being the only weapons for a while.
Also, on the note of early handguns, there’s actually a dilapidated Klaucke (and a dilapidated handgun silencer) on top of the blue kiosk by the pier at Yttervik. it’s a bit of a pain to get up there, but it’s still weel within possibility to get a Klaucke right off the bat. Actually using the Klaucke that early is a bit tough however (ammo scarcity is a significant issue for everything but the Möller that early), so whether it’s actually useful or not is a whole other question.
Edit: Images as promised:
This is a Glock 42 (it’s narrower and shorter than a G17, so the spacing on the sights is different) in a bright room with factory Glock Night Sights:
Note that there’s essentially no glow whatsoever, but you can clearly see the tritium-phosphor phials. The lighting isn’t quite bright enough to show it, but the white rings are actually rather reflective in daylight.
And now in low light (ambient lighting is from my computer monitor in an otherwise dark room, sorry about the quality, my phone doesn’t like low-light conditions without a flash):
The glow is visible, but pretty obviously not the neon green bordering on yellow that the in-game guns have. Also, note the still visible slight inset of the tritium-phosphor phials, they’re deep enough that you can’t see the glow at all if you’re more than about 60 degrees off angle from the back of the gun.
And for completeness, same gun in a completely dark room, with the aftermarket green laser sight on for reference:
This one makes it a bit more obvious how dim the sights really are. That hotspot just above the gun is the point of light from the laser itself (the lens on the laser doesn’t focus it very well, so there’s unfortunately lots of extra glow from it).