With hard work and ingenuity you can come up with your own gun design, but you need to have clear knowledge of the weapon you are making. A gun is generally any weapon that is built to discharge shots or bullets by exploding gun powder or any other explosive installed in a straight tube or barrel. Building your own gun may be a result of various needs, including defense and protecting yourself, and a gun can be constructed from the local available materials. Here is how to get started on your project.
When making a gun and any other weapon in general, the main objective is always to fire ammunition effectively to hit the target object. Therefore the ammunition should include different components such as a piece of lead or bullet, some amount of smokeless powder that is usually made to create a large amount of gas as it burns, which will propel the bullet through the barrel toward the target's location. The primer, which is designed to ignite the gunpowder, and a steel casing to hold the bullet, the gunpowder, and the primer must be kept all together and well positioned for effective gun firing.
The Gun Barrel
When building your gun, it's essential that a barrel of 16 inches or longer is put in place. This is very important when making a quality firearm. The barrels should have tiny grooves cut inside them and should be curved slowly through the length of the barrel, which is also known as rifling. The grooves are designed to make the bullets spin when passing through the barrel, which helps in stabilizing them and making the gun more accurate. Most improvised guns, however, use water pipes or steel pipes, which make effective short barrels. This is also determined by the kind of ammunition you intend to be using, a "¾" pipe will hold a 12 gauge shotgun ammunition, while "1/4" pipe will hold 9mm shells.
Installing a Firing Pin
The primer is always an extremely pressure sensitive part, so when installing it you should not strike it hard, since it can easily explode. Also, the primer should be protected behind by a metal wall that is nonetheless pressure sensitive, so that when struck by the firing pin it will create a flame by igniting the gunpowder.
The trigger should be installed carefully so that when the firing pin is released to strike the primer, the gun will fire effectively.