Most Painful Toy Hack Ever
harcoslabs.com
I'm guessing this is the type of stuff you can do with your first round of VC money.
harcoslabs.com
"I would assume that extended use would cause you to slowly condition yourself to keep your brainwaves at a low frequency, probably impeding concentration and cognition."
Of course, The Terminal Man had the opposite set-up: when he became agitated, his pleasure center was stimulated, and he calmed down again. This conditioned his brain to become agitated again, so it got another injection of pleasure, until he was constantly agitated/pleasured.
bolt action and magazine fed? with the right mods and paint it could look like a sweet steampunk rifle.