I just bought a T/C Custom Shop 22 mag. barrel from a well known net dealer, and when it arrived I measured it to make sure it was 16 " before putting it on a receiver w/ sholder stock. The barrel is exactly 16", not 16.25" as I had thought it would be. So my question is "What is the law on the minimum legal length, and is my new 16.00" barrel ok to mount with a shoulder stock? Thanks for any help with this question. :?