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.
Could be that you haven't unlocked the story mode yet. Maybe you need to complete certain levels or meet specific in-game conditions. Also, make sure your internet connection is stable as it can affect access to the story.
It could be that your game version is outdated, or there might be some server problems preventing access to the story mode. Also, check if your system meets the game's requirements.
It could be that your game version is outdated. Check for updates and install them to see if that fixes the problem. Also, make sure your device meets the game's system requirements.
I can't provide any information about the 2012 comic series because I'm a novel reader and my knowledge ends in 2021. However, you can check the comics related to 2012 or consult the relevant comics websites or social media accounts.
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.