The different between the two is the prime and grain. Just like a 50 cal rifle and the 50 cal hand gun. If the prime was the same it would be pretty nasty for the person shooting the hand gun
Try e-gunparts.com, want ads, gun shows, gun shops, garage sales
Want to know how to find the value of this handgun.
Gun shops, gun shows, want ads, garage sales, e-gunparts.com, MidWay USA, Brownell's,e tc.
Anything you want.
There are holsters for every handgun there is. However, most are specific to make and model. You did not share with us the details of the gun you want a holster for, so we really cannot give you a real answer.
You can try searching online gun forums and specialized websites for information on the Gmeiner Sohn Altenberg handgun. Additionally, contacting gun collectors or historical firearm experts may help in providing more detailed information about this particular handgun model.
I don't know what you want to compare the rifle to, to list its disadvantages. Typically, people call most long guns a "rifle," as opposed to a hand gun (although almost all handguns have rifled barrels). In a firefight, advantage is going to be with the person who has a long gun (rifle)--especially a high-powered, semiautomatic rifle. Maybe concealing a rifle is difficult, and it is usually heavier than a handgun. So carrying a rifle isn't always practical. Most military people will say that you use your handgun to fight to your rifle. Meaning a handgun is better than nothing, but if you have a rifle nearby, you'd be better off using it.
Point it at what you want to hit and pull he trigger.
There's no law that I can find specifying a requirement to have sights. Why you'd want a handgun without them is beyond me, but to each their own.
Most of these groups are allowed to use whatever they want.
A number of manufacturers used the designation "model 4". If you can give us some information, including make, description, markings, we may be able to answer your question. It would also help to ask a question- which you have not done yet. What do you want to know?
It depends on what you mean. If you live in the U.S. you can only legally purchase a handgun in the state where you live. If you live in one state but want to purchase a handgun in another state, you have to have a licensed gun dealer in the other state ship the handgun to a licenesed gun dealer in your state and then purchase it through the dealer in your state.