Glass & Gunpowder Filled spikes

Utility

It is purely meant as a civilian way to defend themselves from an invading force or be used in a battle between militaries or civilians in legal circumstances.

Manufacturing

There are not many requirements in order to make this simple trap or defense spike. You only need knowledge of glassblowing and the abiltiy to create gunpower(along with light a fuse). Theoretically anyone can make it,and its not hard to produce at all.

Social Impact

Literally this is only deadly if the fuse works perfectly, the glass doesnt break or gets shot mid-air, and the gunpowder is nice and strong. However in terms of soical impact, it doesn't really matter, because the other weapons of the world overshadow this minor weapon made somewhere on a big island in a glassblower's workshop

Inventor(s)

The inventor's name has been lost to time, for he was a common glassblower with no family, but we just call him exploding glass guy. All we know about him is that he was born, he loved to blow glass, had some knowledge in gunpowder, combined both gunpowder and glass to make a weapon, then no one ever heard from him again

Access & Availability

It is common knowledge for the blueprints for the civilian and military industries, meaning it can never really be lost to history as long as one man remembers it.

Complexity

3 ingredients: Glass in a shape of a spike, gunpowder, and some fuse string. Very simple unless you don't know how to acquire gunpower. Very hard if you don't know how to make glass, and impossible if you dont know how to make glass and gunpowder.

Discovery

Its discovery was simply a combination due to existing glass manufacturing overmight and a surplus in gunpowder. It was even discovered because of a glassblower getting so bored, he decided to make a javelin looking spike filled with gunpowder, and a fuse at the end to light said gunpowder.