[ctdonath2]

You laugh.
Google “Maadi-Griffin Pistol”.

And while you’re at it, look up “Mossberg 590 AOW” (a 12-gauge pistol), “Mosin-Nagant pistol” (there’s a few cut down to that size), “Stinger pen gun”, “Any Other Weapon examples”, and “Swiss mini-gun”. They’re all real.

[Sea Parrot]

More than a few, the Obrez for decades was a favorite cheap assassin weapon and the rural bandits really liked it.

http://www.gunandgame.com/forums/attachments/powder-keg/27934d1261021480-mosin-nagant-obrez-9130.jpg

https://www.google.com/#hl=en&gs_nf=1&tok=grTl84jp7-zu8eyQaI6myQ&pq=mosin%20nagant%20obrez%20pistol&cp=19&gs_id=3&xhr=t&q=mosin+nagant+obrez&pf=p&sclient=psy-ab&oq=mosin+nagant+obrez+&aq=0K&aqi=g-K1g-b1&aql=&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=3fa1f89c4f8a0fee&biw=960&bih=461

[TurboZamboni]

used to have a Serbu Super Shorty.

basically a 12 GA pump pistol.

[deoetdoctrinae]

Granted it wasn't a production firearm, but this still has to go on anyone's "What were they thinking" list.