Both Crosman and Daisy made over 40 different models of BB guns for Sears under the Sears brand name. Which one are you asking about.
see the link below for the owners manual
All of Sears BB guns began with 126.xxxxx (Made by Crosman air gun co) or 799.xxxxx (Made by Daisy BB gun Co) check your numbers again and re-post the queston.
It would help if you stated the model. Sears sold several different BB guns.
All of the Sears Model 799.***** BB guns were made by Daisy air gun .You may want to contact them directly or search the web for an 'Air gun repair" shop to locate someone to repair the BB gun for you.
To load a Sears and Roebuck BB gun model 79919052, first, ensure the gun is pointed in a safe direction and is on a flat surface. Open the loading port, typically located near the barrel, and insert BBs into the chamber, making sure they are seated properly. Close the loading port securely. Finally, cock the gun if required, and you're ready to shoot. Always follow proper safety precautions when handling any firearm.
Consult the user's manual
I believe you are asking about a BB rifle made by Daisy for Sears, the model number is 799 9045. If this is it, then it's a Daisy model 25. To load the BB gun you have to unscrew the very end of the barrel. pull it out you will see a spring inside a long tube. Pull it back and load the tube with BB's let the spring go back down and push the BB together Now carefully screw the tube back into place and cock the forearm back and forth. You are ready to fire.
Daisy. I believe it may be a model 25 made by Daisy for Sears
Put in the magazine. load the magazine, and shoot.
Daisy and Crosman made numerous BB and pellet guns for sears over the years. Without more information it is not possible to answer you.
Im not sure they had BB guns in the 50's, if they did, probably about 5 bucks.
They were made by both Daisy and Crosman. Any BB gun model starting with 799 was a Daisy and any BB gun starting with model number 126 was a Crosman.