The gun weapon in "Dynasty Warriors: Origin" is a very unique weapon in the game. It is not difficult to use. It has a long attack range and is easy to use, and the "Piercing Revenge" combat skill can be used as a Great safety valve if you can't time your parry perfectly.
What are the characteristics of gun weapons in Dynasty Warriors Origin
Pick up the gun when you're in doubt. It has long attack range, is easy to use, and the Piercing Vengeance combat move serves as a great safety valve if you can't time your parry perfectly.
The gun is slightly inadequate against airborne enemies and will likely be replaced by higher-end polearms later in the game, but in early combat it's hard to find a better choice than this reliable, pointed weapon.