MC  centuries ago gets reincarnated into a cultivation world with Daily sign-in system. He reached the peak of the world with after gaining two character templates Yan Sen from Cultivator Against Hero Society  and Yogiri Takatou from Instant Death. Even with just less than half percentage on Character templates, he reached pinnacle of the world, so becoming bored jumped to a different world, while sealing majority of his powers, so not too destroy the new world he entered.Thus he reached the Douluo Dalu world.

2).Cross bows from Honkai Impact and Bows from Genshin Impact. Swords, spears..etc


3). Marvel's spider man game webshooter


4).Fang and Excalibur from Blue Exorcist.


5).For Battle armor it is either Garou anime or Gransazers show amrour


6). Maybe introduce guns from Honkai Impact or Star Rail. After all Lou Gao was a divine craftsmen in this period, if taught by MC he could become a master in this field.


This in mainly because Tang San's hidden weapons progressed the world technology a lot. 


But if not this, I will mess with Tang San by creating Tang Sect here decades before he is born, MC will create a synthetic human like Albedo with the appearance of Tang Sects previous elder to mess with Tang San a little.


Chapter 13 - Spirit Weapons ideas