⚠️ Don’t Mix Old A1/A2 Barrels with M4 Parts! | Gun Stock Reviews with Yamil Sued & Marty Enloe 1056

In this episode of Gun Stock Reviews, Yamil Sued and Master Gunsmith Marty Enloe break down a common AR build mistake — mixing older A1/A2 barrels with modern M4 components. The barrel extensions are NOT the same, and this mismatch can cause serious fitment and reliability issues.

Learn what to look for, how to identify the differences, and how to avoid this costly pitfall before assembling your next AR-15 upper.

👉 Watch, learn, and build smarter with Yamil and Marty!

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