"BB" means ball bearing.
BB stands for Ball Bearing
Pretty much outside the scope of a hobbyist
FPS = feet per second.
BB = ball bearing. One size that is used allot is the 4.5mm ball bearing
If its a BB Gun, Then Yes.
BB gun. Fires a round BB.
It's a BB Gun.
Which model, what is the condition of the BB gun or is it a BB rifle..
Benjamin Breckinridge Warfield did not invent the BB gun.
A BB gun is a gun which shoots BB-size pellets, typically with the use of compressed air, or a compressed spring.
You don't magnetize the BB's. The Magnet is inside the BB gun. The gun has to be taken apart and the magnet that holds the BB's replaced. Not all designs use this method of holding BB in place.
You can mail a BB gun via UPS.