Can You Identify These Rare Weapons?

I found these pics online, but no names or details were included with them.  So, if you see something you recognize, let me know in the comments and I'll add the name in the caption under the pic .  

Also, if you know of a unique rare weapon that isn't listed here please add a pic in the comments and I'll add it to this blog.

1 - Pistola con Caricato - http://guns.wikia.com/wiki/Pistola_con_Caricato

Pistola con Caricato

2

3 - Treeby Chain Gun - https://www.forgottenweapons.com/rifles/treeby-chain-gun/

4

5 - Astra 400 in 9mm Largo - https://www.gunsinternational.com/guns-for-sale-online/pistols/astra-pistols/astra-modelo-1921-400-9mm-38s-m400-semi-pistol-9mm-largo-38acp.cfm?gun_id=101141544

Astra 400 in 9mm Largo with experimental magazine

6 - Treeby Chain Gun - https://www.forgottenweapons.com/rifles/treeby-chain-gun/

7

8

9

10 - Duck Foot Pistol - http://dave-cushman.net/shot/ducksfoot.html

Duck Foot Pistol

11 - Petit Protector Ring Gun - https://www.guns.com/2013/08/17/the-petit-protector-the-ultimate-ring-pop/

Petit Protector Ring Gun

12  Painted NERF blaster.

13 - https://www.range365.com/strange-guns-harmonica-pistol

The Harmonica Pistol

14

15

16 - Pepper-Box Revolver - http://firearmshistory.blogspot.com/2010/06/revolvers-pepper-box-revolver.html

Pepper-Box Revolver

17

18 - Pepper-Box Revolver  - http://firearmshistory.blogspot.com/2010/06/revolvers-pepper-box-revolver.html

Pepper-Box Revolver

19  Apache Centerfire Revolver http://www.gunsandammo.com/editorial/three-weapons-one-apache-centerfire-revolver/249789

Apache Centerfire Revolver