I am assuming that you mean guns, they are fully automatic rifles & handguns, guns with silencers or pretty much anyone that would be used by the armed forces.
Use the three weapons and the ninja vision
the doom weapons are level 8 weapons and do lots of damage.
You need to be level 35. There are also better maple weapons but they are level 64+. If you are lacking your secondary stat, you will need to use the level 35 Maple weapons until level 64.
by going into paradox mode, it lets you get your weapons past level 5
Weapons cannot be "leveled up" in TF2
Nuclear weapons, Biological Weapons, Chemical Weapons.
Level up to level 15. Return to Elder Village. A window will pop up showing you the three job paths. Go to the board and select one of the three job quests(weapon taker is amongst them).
You can keep the weapons you collect in the level but only if you complete the level, hope that helps.
As soon as you start the game you get weapons. At level 99 you get the bonus weapon. You unlock other weapons at level 32 also.
level 1
what are the three dangerous weapons used in world war1?
You can buy bonus weapon at level 99. But cuba loot weapons are the best for fighting and defending. Have fun ..