Ayo. I need some help making cool weapons for my campaigns, my friend black bear suggested the axe gun, so I want some more inspiration for stuff like that. Please help me.

This isn't "arts and craft"  more "general discussion". But I'll give a few suggestions.

Chain sword. A finesse sword with reach. Slashing damage within 5ft 1d6, piercing damage at 10ft 1d4.

Bolo. Short ranged weapon 1 point damage with the ability to either grapple or knock prone medium or smaller creature.

Spiked guantlets. Gives unarmed strikes 2 + strength modifier.

Arts and craft is all about what you've physically made. A little paper, clay, glue, 3d modeling even.

K thx

I like how you think! I have weapon ideas bananza! Though, do you want magical weapons? Or non magical?

Yeah, I don't know if you want magical or non-magical, but here are some cool magic weapons (well, I think they're cool) I found on D&D Wiki: 

Illogical Weapon

Weapon (any), rare

Although it looks and feels like a regular weapon, the Illogical Weapon acts strangely when used. While a regular sword inflicts slashing damage, an Illogical Sword might inflict piercing. And while a regular bow inflicts piercing damage, an Illogical Bow might inflict bludgeoning.

You gain a +1 bonus to attack rolls and damage rolls made with this magic weapon. Every dawn, and every time you roll a critical hit with this weapon, roll a d6 on the Illogical Damage table. The Illogical Weapon now inflicts that type of damage until the next dawn or critical hit, when you roll another d6. On a hit, you may also cause an effect related to the damage type described below in the Illogical Damage table as a bonus action. You regain use of this effect after you finish a short or long rest.

Sharpshifter

Weapon (varies), rare (requires attunement)

This black piece of amorphous metal looks like nothing more than a large chunk of obsidian when no one is attuned to it. When it has an attuned wielder, that wielder can morph and change the weapon's shape as a bonus action. It can shift into any known mundane weapon. It can also shift into any other shape that the DM deems doable with the amount of metal available. Sharpshifter can also take the form of armor for a section of the body (about one limb, half of a torso, or helmet). This armor grants the wearer +1 AC. If attunement is ever broken, Sharpshifter returns shape to it's rock form, sliding off the current wearer or wielder.

Yo-Yo of Dooooooom

Weapon (yo-yo), rare (requires attunement)

A child's toy left that has been enchanted by a old and senile magician who wanted to turn his towns next generation into warriors at an early age. This yo-yo was the magicians last work, discovered after the parents of the children killed him. The yo-you can emit an ominous glow, casting dim light within 20 feet. This effect may be turned off or on as a bonus action. This weapon deal 2d6 extra necrotic damage.

Heres the thing. I want ALL the weapons. (And vehicles). Magical and no magical. D&D B is the limit!

Quote from Yondor_The_Fantastic >>

Yeah, I don't know if you want magical or non-magical, but here are some cool magic weapons (well, I think they're cool) I found on D&D Wiki: 

Illogical Weapon

Weapon (any), rare

Although it looks and feels like a regular weapon, the Illogical Weapon acts strangely when used. While a regular sword inflicts slashing damage, an Illogical Sword might inflict piercing. And while a regular bow inflicts piercing damage, an Illogical Bow might inflict bludgeoning.

You gain a +1 bonus to attack rolls and damage rolls made with this magic weapon. Every dawn, and every time you roll a critical hit with this weapon, roll a d6 on the Illogical Damage table. The Illogical Weapon now inflicts that type of damage until the next dawn or critical hit, when you roll another d6. On a hit, you may also cause an effect related to the damage type described below in the Illogical Damage table as a bonus action. You regain use of this effect after you finish a short or long rest.

 

Sharpshifter

Weapon (varies), rare (requires attunement)

This black piece of amorphous metal looks like nothing more than a large chunk of obsidian when no one is attuned to it. When it has an attuned wielder, that wielder can morph and change the weapon's shape as a bonus action. It can shift into any known mundane weapon. It can also shift into any other shape that the DM deems doable with the amount of metal available. Sharpshifter can also take the form of armor for a section of the body (about one limb, half of a torso, or helmet). This armor grants the wearer +1 AC. If attunement is ever broken, Sharpshifter returns shape to it's rock form, sliding off the current wearer or wielder.

 

Yo-Yo of Dooooooom

Weapon (yo-yo), rare (requires attunement)

A child's toy left that has been enchanted by a old and senile magician who wanted to turn his towns next generation into warriors at an early age. This yo-yo was the magicians last work, discovered after the parents of the children killed him. The yo-you can emit an ominous glow, casting dim light within 20 feet. This effect may be turned off or on as a bonus action. This weapon deal 2d6 extra necrotic damage.

 I love the yo-yo

Check the homebrew in my sig, its full of weapons

Bolo. Short ranged weapon 1 point damage with the ability to either grapple or knock prone medium or smaller creature.

kodi nox 

Small knife that does (1d4 percieng and has a bullet you can shoot out the handle (1d8 percing)