.500s&w
The .950 JDJ is the biggest rifle The biggest hand held gun is the 600 Nitro Express Pistol
The BATFE web site has information that can assist you in answering your question.
38 caliber hand gun
desert eagle
A small caliber hand gun
No
gun shops, gun shows, want ads, e-gunparts.com
21 for hand gun 18 for long gun
50-100 USD
You must provide the model and maker.
50-125
25-50 USD