What Is It? Game 129

I think it looks like an old air powered harpoon of some sort.

A device for killing rodents such as moles or gophers.

Looks like a killer-whale trainer flosser.

A folding hook thrower used to climb high buildings?

An alarm gun. The spikes are put into the ground and strings are run from the trigger mechanisms to a nearby tree. When an intruder tripped over the string, the gun fired alerting their presence.

The "Go-go-gadget arms" of Inspector Gadget: The Cavalier Years

The lost sidearm of DaVinci's robot can be found in the shrine of the silver monkey.

Birdfeeder

An early torpedo.

It belongs to cupid.

looks like a weapon/tool used for besetting a castle or fort.
you would shoot the arrow into any wooden parts and then a horse/a bunch of people would pull.

prostate exams were less pleasant in the old days

a victorian era Batman?

14th century taser dart.

Seems like a device to close doors...

It is a Togaloon. In the city of Urenal, Bavaria, a law was passed in 1893 that while not outlawing the death sentence, outlawed execution. So you could be put to death but not at the hand of your fellow man. To overcome this a stalwart inventor devised a clockwork gun that would fire a deadly ball at a preset time. The condemned man (a rapist or a papist, the account varieds) was tied held up to a window while tied to a chair in a building in line with the three o'clock death hour. The gun fired, the prisoner flinched and the ball grazed his head, burying itself in the forehead of a bust of the Emporer. The next day the army arrived, arrested and executed the town fathers for treason. The prisoner was freed as he had stood for execution and survived. He then went on to serial rapine or sainthood, again the story varies.

Harpoon gun.

It's an old surgical tool used to cut into flesh and spread it apart to have a better look at the gooey insides.

it looks to be like an old crossbow of some sort, but it is probably more something like an old fashioned harpoon gun for whale hunters.

Old school laser pointer.

Painfull

It's a taser dart. I dig them out of people in the emergency department.

Early gynecological instrument.

Since you asked for t-shirt selection: Come to the Dark Side.

IUD

Drain/Pipe clog remover???

This looks like a gun used to fire a light line from a tug or boat to another boat in distress. A heavier rope or cable could then be run along this line with which to secure or tow the stricken vessel.

OR... Could possibly be a "burglar gun". Same concept as I stated in an earlier guess, but when the string is pulled, the gun swivels towards the pull, and shoots the intruder.

1800's Batman gadget.

or it belongs to cupid's evil twin, Dark Cupid. ;)

It's a cat carrier.

what is a ...grappling hook?

Iiiii think it's a bicycle pump...

rocket powered duck gun

The Marquis de Sade's grapefruit juicer.
And sex toy.

Explosive rock breaker.

Elizabethan Homies shirt please, extra-jumbo-extra-elephant-large.

Why would you need to break explosive rocks? C'mon mon!
It appears to be a door bell for the deaf...with that thought in your heads you can figure out how it works and why it didn't get far...

The size is deceiving -- I think based on the size of the screw visible, it may actually be a serger or sewing machine needle of some kind