Anyway, after doing quite a few mods, I have to say that pretty much any blank firing gun can be used to propel "ammunition" out of it. Not real bullets (which are much heavier), but enough to stop someone charging at you and wound or likely kill him.

The simplest way is to drill the barrel (they're fixed on most of these guns so they can't be replaced, so find someone you can trust, btw) with a stationary drill press or worst case scenario, a simple drill (but it's highly inadvisable since you can thin out the barrel if you don't drill 100% straight and it can explode).

Then convert the blank cartridges to "real" ones by inserting ball bearings of the appropriate diameter or better yet .22 or bigger caliber lead BBs (better because they won't ricochet if shot at anything hard like a wall, steel, asphalt, etc.) or if you need it for close range, lead bird shot or very small BBs. Best solution - cast your own, custom-diameter lead BBs using lead from used car batteries - you'll be proud of yourself, as well .

Accuracy in this case depends on how well you drilled the barrel and the diameter of the ammo used - it should be as close to the barrel's as possible.

The likelihood that your gun will explode is minimal - the guns are already made for firing fast-expanding gases and operating the loader/ejector mechanism, plus you have the original hole where the gas escapes to reduce the pressure (can even save you if your bullet gets stuck!). The only way to fuck it up is to fill the cartridge with more powder than originally intended (why would you do that?!) or to thin out the barrel when drilling (that's why be careful).

If you live in some Eastern European country and want something simpler, just get a Flobert gun and fill those cartridges with as much powder (from 8-9mm blank cartridges) as possible. It sounds quite loud and can actually do some damage or even kill if shot at the head (but better just break a window so the attacker knows your gun is real).

Alternatively, you can make a longer Flobert cartridge from 2-3 short ones or a copper/PTFE tube. But be careful - the gun must have a breechblock - the cartridge must not be resting on the hammer (there are some of these stupid guns around) or you'll shoot yourself in the face!

Also, I was stupid and lucky before - if the police catch you with one of these, YOU ARE SO F**KED! 10-20 years minimum and if you kill someone, you go away for LIFE in most countries. And if your gun does not stop the attacker and he has a knife, you're also F'ed!

My personal opinion - totally not worth it! For self defense, better learn to use your fists and legs (throw a few punches and run). But if your hands itch for a cool and dangerous project or you want to have a gun for training and can't get your hands on a real one, go ahead (just have a second blank gun to show to the police and anyone who asks what you're doing )...

Do we nid to change the email address v use to log in into fb?