Well, it's not like the element of Sound is extremely easy to work with considering your timeframe... Your own conditions are making this harder on yourself. Did anything
having to do with sound as we know it exist around 1860?! You might have to reach on one particular field or the other if you're going to be adamant about it. But if you're going to shoot everything down, why ask for help?
Might I remind you that a knife is a real weapon, although not necessarily used as one all the time compared to others. And it was definitely handmade from ancient times onward. This is the most logical thing I can come up with. If you don't like it, oh well, but good luck finding your weapon.
If you need me for ideas, just PM me. I'm usually a great helper, unless I'm too busy. If you want me to review, PM me.
...In fact, if you want anything from me, just PM me, it will be easier!