Not all manufactures offer blueprints of their products. Crosman offers almost all of theirs on their home page. Gamo and Umarex offer a few, but it is very hard to locate most of them.
See the link below
You will have to take it apart. Each model is different so you will have to find a diagram of the rifle.
There are a number of places that an individual can find BSA rifle scopes. Some of the places you may want to try include BSA Optics and Air Rifle Scopes.
Go to airsplat and you should find what your looking for. Or you could look up "air gun repair" on the web.
An Air Rifle is either a BB rifle or a pellet rifle. It uses air or gas to propel the projectile.
a good air rifle is one that you can afford. I suggest you read the reviews of other owners who own them. I suggest the link that is posted below to find an assortment of air guns and rifles and read the reviews.
A scope for an air rifle can be bought at many different places. You can buy one in a gun shop, in a sporting goods store, or even in a pawn shop. You might be find one for sale in your newspaper.
No
A sporter air rifle and what?
Daisy air rifle and Crosman air guns made air rifles for Sears under the Higgins name. Any Air rifle that starts with 799 was made by Daisy air rifle. Any air rifle that starts with 126 was made by Crosman. To get them repaired I suggest that you go on-line and search "Air Gun Repair." There are several places around the USA that repairs and reseals old air guns.
Are you asking how do you swap and air tank on an air rifle, or swap for and air rifle? In most air rifles you put it on safe and swap out the tank by unscrewing it and replacing it.
can i ship air rifle to trinidad and what i need
There are over a thousand different models of air rifles. Each one is different. I suggest you have a professional make the repairs. Check the web for Air gun repair and find a location that you can send the rifle to for repairs.