Yes
50-100
No published sn data
Try e-gunparts.com
Try e-gunparts.com Email me, I have an 8 and a 16 rnd clips
No sn data available that I am aware of.
Some air rifles were available in .22 caliber.
The standard caliber of a biathlon rifle is .22.
The Sovereign model SM64 LR in .22 caliber was introduced in 1964. It is a bolt-action rifle manufactured by the Sovereign Arms Company, known for its craftsmanship and reliability. If you have a specific rifle in mind, checking the manufacturer's documentation or serial number may provide more precise details about its production year.
a .22 caliber
A .177 caliber air rifle has very little recoil.
If you mean legally, yes, in most states in the U.S. a person can own any caliber rifle that is available. I believe there are 1 or 2 states that have state laws restricting caliber.
.223 caliber or 5.56mm.