PROS	CONS
Easy to install.	Hard to find in some areas.
Is removable easily	Hairspray can clog it easily

Probably the easiest and second best way to ignite the combustible material inside the chamber is to have a threaded BBQ ignitor. These are extremely hard to find (at least in my area) because most BBQ's favor the universal ignitor over the threaded type. These 'universal' ignitors are the pop-in kind that will pop-in to any BBQ. They do not pop-in to the chamber of a spudgun because the pipe is too thick. These are useful in other ignition systems though. The way to install one of these is quite simple, but before you can install it you must make the spark gap for it.

3. Estimate how long the wire needs to be in order to be attached to that side curve away about a half inch and curve so that is about a half inch to 3/4 of an inch away from the top electrode.

4. Make sure the wire is pressed up and is directly touching the wire in the slit. DO NOT GET EPOXY BETWEEN THE WIRE AND SLIT! If you do that, I hope you like wasting money getting a new BBQ sparker. Then, take the epoxy and cover the wire touching the slit, and be generous of the amount.

After you have all that done, find a drill bit that is a tiny bit larger than the diameter of the threads sticking out at the back. Drill it preferably towards the end cap, but not to close and PRESTO; you have a simple ignition system installed on your spudgun.

This ranks fourth highest for the best ignition system. These parts are easy to find and can be found just about anywhere that sells grills. The worst property of this ignition system is that you must epoxy the BBQ ignitor DIRECTLY to the spudgun. Well, guess what? When it comes around to replacing the ignitor, you're on your own. This is why I suggest the TWO SCREW SYSTEM.

Pretty easy huh? Well, I wish you luck to try and take that thing off. If you find out how without much fuss E-MAIL me, I've been dying to know how.

PROS	CONS
Won't clog with hairspray	Second-Most Expensive
A base for other ignition systems	Mediocre in difficulty

This is THE way to go according to ignition systems for combustion guns. With this setup you can make two different but similar ignition systems, the TRIGGER-TYPE ignition and the Remote Detonation System.

1.) Drill two holes slightly larger than the shank of the screw but small enough the threads will bite securely. Do this in the thick part 45 degrees apart, along the radius, preferably near the rear of the chamber. Keep them at least 1" from either end.

2.) Insert the screws almost all the way (they should bite pretty good into the plastic. If they don't, get one larger screw size).

3.) Now is a great time to check out a way to make a remote detonation system. Take the two electrical leads, either the ones that came with the spark BBQ ignitor, or your own custom extension wires. Strip the ends back 3/4" and tin if desired, then wind around each screw in clockwise direction. If you want to be really slick you will solder on rings of the correct size.

4.) Finish tightening screws. At this point, the tips should be about 3/8" apart, which is fine. The desired range is 1/4" to 3/8", which can be changed by bending a screw slightly.

5.) Proper insulation is now required, unless you like getting shocked REALLY BAD (I know I do!) Either dab enough RTV (1/8") all around exposed screw heads and remaining bare wire, or wind 6-8 turns of electrical tape around the heads.

6.) Insulate the plunger prior to attachment. Secure wires in their appropriate sockets on the igniter, then wind tape around and around it. You should be able to hold it in you hand and actuate it now without being shocked (only way to test!)

7.) Affix to launcher. I like to use duct tape and bind it directly to the side of the chamber, resting the top of the plunger against the edge of the reducer. Do this, and you are ready to roll! Or, when I get the research done, you can try to make a trigger using this system.

PROS	CONS
Completely inexpensive	Extremely dangerous
Fun to watch (if you're not lighting it)	Extremely stupid

I've heard of other people doing this from other websites and their theory is that it is an old tradition from the older designs being carried over. All I have to say is DO NOT TRY THIS! I've been burned from the gases in the chamber and they burn at around 1000ºF. It stung even though most of the fuel had dissipated. It is not very pleasant and I can only imagine at the potency of it full strength. But, if your daring (and a cheapskate) you can try this at the cost of one match.

If you want to be safer in trying this, I recommend using those lighters with the long tips that is like a torch (I have included a drawing below. Just drill a hole about a half inch to an inch, fill the chamber with hairspray and hold the lighter lengthwise to the chamber NEAR the hole. DO NOT INSERT THE LIGHTER INTO THE CHAMBER! By doing that, you cause a risk of the fuel storage in the lighter to explode AND you will most certainly burn your fingers off when the flames come out of the hole. Once again, I do not recommend doing this setup!

PROS	CONS
The best ignition system of all time!	Most expensive
Very reliable	Hurts when you get shocked

This system was brought to my attention by Spudrok, in which I have given the link to his site for this section because... well... he can probably explain it better than me, seeing as how I've never made this ignition system (yet).

PROS	CONS
Extremely easy to find	Hard to remove
Very easy to install	Hairspray can clog it easily