It kinda of depends on what you want to shoot. Are you going after game or target shooting? (Is money a factor?.) Springers / break barrels come in different sizes of calibers. .177, .22, and .25 caliber. .177 will shoot the furthest but .25 will have the most impact. Some springers are made for smaller frame people and some are made for large adults. As an example the Benjamin Super Streak is a very large air rifle that takes a lot of effort to cock it. ( It's no longer in production.) Several of the Gamo models are much easier to cock. The .25 caliber Hatsan is a normal size air rifle but takes a considerable effort to cock the barrel. I would stay away from Chinese models like "Industry, BAM or Xisico. These may be cheap but you never know what you will get.
Stroger has some nice models out right now and so does Hatsan, but you need to decide what you are going to do with it and then look in that area. Personally I would start with reading the "Owners reviews" listed for each rifle on the Pyramydair web page. Then you will have an informed decision that you can make.
A carbine resembles a rifle, but has a smooth barrel while the rifle has a grooved barrel. The grooved barrel gives a rifle greater accuracy, but a lower muzzle velocity. An air rifle is a rilfe that uses compressed air to launch a pellet, rather than an explosive charge to launch a bullet. <><><><><> A Carbine has nothing to do with rifling. It's a short barrel air rifle or a pistol that has a rifle butt-stock attached to it. In a since it's a cross between a pistol and a rifle. They fire the same ammo as a full size air rifle but are not as accurate. They are used because they are lighter in weight and good in close quarters.
It is used to reduce the recoil of the rifle and as a grip for cocking the barrel.
The Sleeve is the tube that covers the REAL barrel on the rifle. It protects the barrel from damage. It's nothing more than a hollow tube surrounding the real barrel inside.
In general, an air rifle will drive a pellet faster, since the longer barrel permits the pellet to be pushed for a longer time.
In a break barrel and pump rifle it located directly behind the barrel in a large tube. Rifles that use C02 usually hold the C02 bottle under the barrel.
Usually it printed on the left side of the breech or barrel.
Some scopes can cost more than the Air Rifle. Leapers makes some excellent scopes for around $250. Whatever scope you purchase make sure it is designed for air rifles. Air rifles, because of their forward / reverse kick, can break a regular hunting scope not designed for this type of rifle.
There is a Model 740 - plastic stock, cocks by breaking the barrel handle and pressing down. Takes standard BBs which are loaded in mass through an opening in the top-back of the receiver.
Beeman usually has the Model number on the side of the barrel by the loading port or on the barrel by the hinge on break barrel rifles.
There is NO Best and inexpensive air rifle. A good quality air rifle is going to cost you money. A cheap air rifle will reflect it quality by how poorly it performs.
The length of the barrel. Guns/pistols can be held by one hand. While a rifle requires two hands to properly hold it. Both are air powered.
The Slavia 622 is a .22 caliber pellet rifle not a .177 caliber rifle. It is a single shot Break barrel rifle. The rifle is a spring piston shooting system. To load and cock the barrel you simply push the barrel down (Break the barrel) all the way until you feel it cock. Load a .22 caliber pellet into the rear of the barrel (Breech) and make sure it's snug flush with the barrel. Load it with the skirt facing out and the dome in the barrel. Then bring the barrel back up into position and let it snap into place. AIM FIRE!