Well, the canon status of MK comics isn't straightforward. It might be canon within certain story arcs or universes, but not across the board. Different interpretations and continuities can come into play.
The Raiden Shogun's sad story is complex. She was in charge of Inazuma and aimed for eternity. However, she faced many losses. Her past experiences, like the deaths of those dear to her, made her more determined yet also more lonely. She had to enforce rules that in the end created a divide between her and her people. She had to deal with the consequences of her actions when she finally realized that her idea of eternity might not be the best for Inazuma. All these elements combine to form a rather sad story for her.
Well, a popular 'Raiden Shogun Fanfic' is 'Raiden's Trial'. It tells the story of how the Shogun faces a series of challenges that test not only her strength but also her wisdom. It's an exciting read with lots of action scenes. Then there's 'The Shogun and the Sakura Tree'. This fanfic beautifully weaves the relationship between the Shogun and the symbolic sakura tree of Inazuma. It's a more emotional and introspective piece. And 'Raiden Shogun: The Silent Observer' which portrays her as observing the changes in Inazuma from a distance, and then slowly getting involved in the new developments.
Well, the 'dark raiden story' might be related to a particular series. If Raiden is from a game, for example, the story could be about how he turns dark. It could be due to some external influence like a powerful enemy corrupting him or some internal struggle within him. Maybe he has to face his friends as an enemy in this 'dark raiden story' because of this transformation.
The Mk22 precision sniper rifle was a sniper rifle developed by Barrett. It had high precision and multi-caliber features. The gun could be switched between three calibers, 7.62× 51mm,.300 Norma Magnum, and.338 Norma Magnum. It used advanced technology, such as laser rangefinders and ballistic computers, to improve shooting accuracy. The Mk22's accuracy was outstanding in the test. The average accuracy could reach 0.45 MOA, and at its best, it could even reach 0.31 MOA. The gun also had a high range and multi-purpose performance. It could cause a certain amount of damage to enemy targets and vehicles. The effective range could reach more than 1500 meters. The Mk22 had been purchased by the Army, the Marine Corps, and the Special Operations Command, and had shown excellent performance in the best sniper competition.
The length of the MK9 story varies depending on how quickly you progress and explore all the elements. But on average, it can take several hours to complete the main storyline.