As previously delved into, a seemingly endless variety of these are regularly emerging, some of factory quality, others of bedroom quality.

 

A very crudely made model recently trending in numbers, sometimes fitted with a barrel made from a section of brass hex bar. A screw usually serves as a simple magazine latch.

Examples fitted with paintball marker lowers:

A number of oddball ‘T’ guns:

I can’t see the stock being too useful in this case.

 

A regularly seized high quality machine pistol falsely branded ‘CZ Skorpion’:

Various models chambered in .22LR .

Guardians of Mount Narco:

 

A distinctive Tec-9 influenced variant widely seized :

 

In this case, has science perhaps gone too far..?