Do have a powder actuated tool (drives nails into concrete), and the machine tools to convert it if needed. (except for having to build something to rifle a barrell, I could build a pistol from scratch if I needed to)
Much more interesting, I am part owner/builder of a "full sized" ballista.
![](http://www.siege-engine.com/chunk03/mistaballista250-2.jpg)
Its called "mista ballista" It weighs (including the custom trailer it is bolted to) 7,400 lb. It takes at least 3 to set up, but can be operated by one person. For the bowhunters, the design pull is 7,000 lb. (tho the best to date has been 3,700, we kept breaking the winding mechanism. Have a new system, should do a lot better).
For those in the Delaware area, we will be at the "punkin chunk" next weekend (nov 4-6).