You need to give us some more information to answer your question- there are dozens of firearms that would fall under "50 rifle". If you mean a Barrett .50 caliber rifle, anywhere from $6,500 to $10,000- plus another $2000 for a scope.
50-300 USD or so
there is no regestration fee to owning a gun a .22 rifle or pistol can cost as little as $50
Cost: 1 rifle, 1 bullet, several hours of hunting time.
Try e-gunparts. 50 USD or so
boxes of 50 range from 2-20 US Dollars.
Depended on the rifle. $5-$500
There is no one answer, just as there is no one answer for "how much does a car cost?" A used single shot shotgun or .22 rifle may cost $50. Some extremely collectible firearms have sold for millions of dollars.
blue
As much as the retailer charged after their markup. The question is so vague as to be virtually impossible to answer. When you say rifle, you could be talking about anything from a .22 up to a .50 BMG rifle, and even a larger, NFA Class II Destructive Device. On top of there, there are varying loads in different calibers, which will affect the cost, as well.
It is difficult to explain, since money was quite different then. A purchase of $50 was a MAJOR purchase then- since the average man would have worked for much of a year to get the $50. A good rifle might be the only gun that a person would buy in his lifetime, and pass that rifle on to a son as a valuable inheritance. Many of the rifles were made- one at a time- by hand. Later as gun making became more mechanized, the cost of a rifle would decrease. Think of the cost of a rifle as being similar to the cost today of a good used car.
a standard cva 50 cal will run you about 100 if you find the right dealer. i got mine for 65 at a flea market
5-10K or more