Your talking about a PCP (PreCharged Pneumatic) Class rifle. There are very few manufactures of these rifles. At present the "Sam Yang" is the only model that I know of that makes a .50 cal but there may be more. Sam Yang makes the .50 caliber Dragon claw in single and dual tank models. Remember it's not only the rifle but you need a special hand pump or Scuba tank or electric pump to fill the air tanks. You can not use a regular "Air Compressor" to fill the tank.
See the link below for the rifle. "Pyramyd air" also sells the pellets for this rifle along with several other PCP rifles.
No
A .177 caliber air rifle has very little recoil.
air rifle
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Both Shinsung and Sam Yang make a 50 caliber air rifle. The largest caliber Weinrauch makes is a .25 caliber.
The model 100 is a .177 caliber air rifle. The model 101 is a .22 Caliber rifle. Basically the same air rifle just different calibers.
Depends on the rifle. Accurately? About 50 yards max.
The Olympic air pistol and air rifle events use a .177 caliber pellet. The biathlon (skiing and shooting) uses a .22 caliber rim fire rifle.
A 22 caliber rifle is a firearm and a BB gun is an air gun (Not a firearm) Now if you are asking about a .22 caliber air gun then the difference is in the size of the projectile. A BB is a hard round .175 caliber ball. The .22 caliber is a larger size pellet.
This is a very nice air rifle. It is a .22 caliber not a .177 caliber rifle. it was made in two variations from 1957-1964. See the link below for the Owners manual.
You will have to provide the caliber and whether it is pump or CO2 powered.
Blue Book of Airgun Values