While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
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How much do you want to spend? If it's less than $50, you're out of luck. A re-barreling will cost you $200-$250 + the cost of your barrel. Does the firearm have any significant value to you? Enough to justify spending $300 to $600?