This YouTube video provides a test and evaluation of a prototype 18-inch, 1 in 6 twist barrel for an AR-15 platform, manufactured by Green Mountain from 416R stainless steel. The video is presented in HD and includes links to the creator's website for email sign-ups, merchandise (1776 United Shirts, Forged From Freedom Shirts), patches/stickers, and an Amazon affiliate shop. Social media links for Facebook and Twitter are also provided.
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