Ithaca 37 pump: Slam Fire
Some scary questions on this thread...
Slam Fire: my opinion on slam fire may go against the norm, I don't care for it at all. In this day and age, it should be possible to have a 'proper' trigger in pump shotgun. One that allows you let go of the held trigger after a new round is chambered, to let you pull the trigger again to fire the shell. Same as the trigger on an AR. I'll step off the soap box now.
Historically: The Winchester 1897 was the first pump action shotgun to be able to be slam fired. The proper way to shot the shotgun is to: pull the trigger and fire a round, release the trigger and pump in a new round, put the trigger to fire this round. The 1897 trigger did not have a disconnect, if you held the trigger, it would fire when the bolt was in battery. This is adjustable, IOW, there is an adjustment (a small screw) that you set for when the hammer will drop. In WWI, slam fire was a good thing, as in the heat of the battle, sometimes soldiers would forget to release the trigger, but it didn't matter, as the shotgun would fire on it's own as soon as the bolt was in battery. I suppose you could refer to it as a fully automatic pump shotgun, pull the trigger and pump until you are out of ammunition. If a semi-auto had a trigger like the 1897, it would be full auto.
So, militarily speaking, slam fire trigger versus disconnecting trigger, may even be an advantage. The 37 was also used in police forces and the military. It had a trigger that would slam fire. It was not built like the 1897 trigger. It looks completely different. Holding the trigger down, allows a pin to let the hammer fall at the end of the pump stroke. This is how the first generation 37's worked.
Then, later on, when slam fire was no longer in vogue, especially not with the firearms legal department, Ithaca removed the pin that automatically activated the trigger if it was held down. This is a really poor fix, if you hold the trigger down and pump in a new round, it pretty much incapacitates the gun, releasing the trigger and pulling it again does nothing, as described in an earlier post, the hammer just follows the bolt forward. I had one of this generation, I think it can be converted back, IMO.
The latest Ithaca 37's, if my information is correct, have a re-designed disconnecting trigger, they probably can't be made to slam fire.
That being said, any shotgun can be made to slam fire. All one needs to do is jamb or weld the firing pin to stick out from the bolt, just like on a semi-auto that fires from the bolt open position. IOW, the trigger releases the bolt, and the bolt fires the shell. I've already made my position on slam fire fairly clear, so stating my position on doing such a modification would be moot.
When I bought my first 1897, I felt compelled to try the slam fire. Honestly, it scared me, having a gun fire without pulling the trigger, it just seems wrong to me. Certainly for a pump shotgun. I learned to shoot shotgun on an 870, and although I shot the odd model 12 and Ithaca 37 back in the day, I was unaware that they would slam fire. Shooting firearms is a discipline, and releasing the trigger during the pump is my discipline. I've fired automatic rifles, shooting it felt natural, because a machine gun is designed to keep on firing until the trigger is released. IMO, it is a design flaw if a pump shotgun will slam fire.
If you search on the 37, you will find pictures of the different triggers.
Nitro
PS: I agree, scary questions indeed.
https://www.youtube.com/watch?v=gOJJm_cSRds