100-1000 + USD depending on specifics.
Browning Automatic Rilfe
In adequate information to answer the question.
In the USA
$4100 to $4500
46x53 nado
You need to contact the National Rilfe Association.
A rilfe that you get started with. Not the most or least expensive
trade name. 10-50 USD
Best reference is the "The Black Rifle II" by Bartocci
Usually a spring holds the MAGAZINE in place. I don't know of any .22 rilfe that uses a clip.
No! ANYONE carrying a rilfe concealed in, or under, a piece of clothing is violating the law, and carrying a concealed weapon.
I'm not familair with a rilfe known as a 227, but in general, no one caliber is "better" than another caliber- they are useful for different things.