A very loud BANG!
Do you mean "What sound does a rifle make"? If you do, it makes a very loud "pop" similar to shooting a cap gun but about 1o times louder.
they did at one time
Air rifles can push a lead pellet at or close to the speed of sound. Yes they are lethal, and very accurate.
long rifles rifles and hand guns
Yes
No
You get what you pay for.
As of 2010 they did.
they make them to kill there own familes with rifles
Luger DID make some really beautiful rifles. Technically they are carbines- short barreled rifles. They have a fixed shoulder stock, and a forearm. They should not be confused with the long barreled pistol with a detachable shoulder stock.
No
No.