The thing is that, for most guns, Argon Scope doesn’t do a whole lot for them. Many that actually use the mod don’t use it on stuff like dread, because dread doesn’t need it.
They use it on things like Tenora, Stradavar, and Latron Wraith which all have mediocre crit chances without the mod, while still being considered crit guns.
And from there, ALL that does is make crits more consistent, not actually stronger. There are few guns where Argon Scope would help reach orange crits consistently.
Orange crits double your crit multiplier, and red is 4x.
However, you’d need like 50% base crit chance to get 200% on a gun with Argon Scope, and only like 4 guns have that.
In short, there are very few weapons that Argon Scope would even rival Bladed Rounds for. And even then, it’s more for quality of life or consistency than it is actual power.