Actually am working on that in another prototype. I had the idea to make the trigger a carb for a while, but it was my friend who suggested a feasible lighter configuration. Similar to how a paintball gun has a loading opening on the barrel, so would the bowl go near the hammer. instead of the trouble of building in a lighter (dunno if i can do that, would have to scrap a cheap butane lighter to try it), i was debating making a slot in the handle at the top so that a standard BIC lighter slides in and sits with the top poking out. Then one makes the same movement as to cock a hammer, to light the lighter. The bowl, being adjacent to the top of this lighter, would then light by inhalation.

I'm thinking I have to make this a composite, using plexiglass and either wood or metal for the parts that heat up. The gun made of wood was thrown together roughly and i was dissappointed in the imprecision of both my tools and my carving skills... i probably could not put a decent finish on that piece, and it has several major issues (chunks ripped out) already that would compromise it looking professional.

A drop-in slot for a BIC would be brilliant, but of course building a lighter in would be better. It would have to be the sort of refillable butane lighter that wasn't a jet (shoots out a blue flame). The yellow flame is able to curve around the lip of the bowl and light the contents, whereas a jet lighter only fires straight. I have seen lighters where the piezo sparking mechanism pulled back just like a gun's hammer... now the question of finding one that comes apart easily and can be reassembled inside the handle of the device.

Edit: after writing that, I don't think a built in lighter would be the best option. There are a number of cool ways I could make the thing hold a BIC, now that the air hole would no longer go through the butt of the gun, and lighters in general fail too often to merit building them into a permanent piece. Should anything go wrong with the lighter (and something always eventually goes wrong with a lighter), the piece would be worthless for that feature and would have to be sparked with a seperate lighter, with the built in one still visible but unusable.

I've actually been calling it The Smoking Gun, for the double meaning (and it does actually emit smoke from the barrel inbetween hits, as the current wooden version has no carb). Probably will stick with my name just because of paraphenalia law and terminology (i was told that a local shop owner my friend knows well would buy such a piece to offer in his store if i could make it professional enough, which i know is a long shot from that prototype).

Interestingly, I used quarter inch and 5/16 inch bits to drill the holes, so the airflow ends up being incredibly smooth, as easy a draw as plain inhalation, and yet the smoke gets dense and the hit is very powerful. The properties have so impressed me I think I may make it my trademark now... an unusually large bore that provides a smooth yet knockout hit.

There is one big issue though... the reason I put the bowl on the bottom for this wooden one is because there are few angles to put a gun shaped object into your mouth while keeping it upright. The point of the piece is that it's held like a gun, but with the bowl on top it could prove to be an odd angle for the wrist.