Quite a few of you asked what the hook is for in the previous post regarding the SPAS-12.
The hook on the SPAS-12 is for one-handed shooting. It rotates left or right by pushing down on the spring tension. The idea was that a user could hold onto the pistol grip, with their forearm being supported by the hook.
They could then fire it one-handed around a corner or over a barricade.
While it sounds kind of practical, it isn’t. The SPAS-12 as mentioned is a heavy shotgun; more front heavy due to the heatshield. While it can be done, it’s not something you care to do often.
Here is an example of a SPAS-12 owner using the hook (though hard to see) to fire one-handed. Note how the shotgun is pointing slightly downward. Even for a fairly large individual, balancing the SPAS-12 one-handed isn’t easy.
On a side note, it also can be used as a carry handle.