Is Pinning a Barrel Really Necessary?

Can we live without S&W barrels being pinned?
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The short FAQ Videos playlist will answer most questions you have:

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Hickok45 videos are filmed on my own private shooting range and property by trained professionals for educational and entertainment purposes only, with emphasis on firearms safety and responsible gun ownership. We are NOT in the business of selling firearms or performing modifications on them. Do not attempt to copy at home anything you see in our videos. Firearms can be extremely dangerous if not used safely.