Even if I’m not perked into the weapons, I still have every intent to use them. Then toss a shotgun on my bar if I find one. So I’ll carry half a stack of 9mm for a pistol and one spare reload for the AK. I don’t mind carrying multiple guns that use different ammo types as I generally want to carry those ammo types if I find them while looting. However, a silenced 9mm pistol can do that job and I’ll back it up with something like the AK. Personally, I use a bow or crossbow for relatively silent high damage shots for stealth bonus shots, but keep a pistol or SMG for those oh ♥♥♥♥ moments. It kinda just depends on what weapon(s) you use and what you use them for. If you are modding the marksman rifle, you’ll probably want mods that improve bullet damage or sighted accuracy.
If you hipfire a lot, then having mods that help with hipfire accuracy will help and you won’t necessarily need a sight. Depends on the weapon and how you prefer to use it.