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This barrel no longer requires the use of a two-piece gas block, the low profile muzzle device allows the use of any gas block with a .750" inside diameter.
This YHM barrel features a 5.56x45mm NATO chamber for full compatibility with surplus mil-spec ammunition or commercial 223 Remington ammunition. Constructed of 4140 chrome-moly steel, the barrel is Melonited for ultimate surface protection. The melonite coating provides a thinner surface than chrome-lining, so bore friction is reduced for better accuracy. In addition, melonite is harder than chrome-lining providing a longer wear life. This barrel features a permanently attached Low Profile Muzzle Brake (YHM-25-A) that brings the overall length of the barrel to a legal 16".

  • Surface: Diamond Fluted
  • Length: 14.5" (overall length with muzzle brake is 16")
  • Weight: 1.78 lbs.
  • Material: 4140 Chrome Moly Steel
  • Chamber: 5.56x45mm NATO
  • Twist Rate: 1 in 8"
  • Chrome Lined: No
  • Finish: Melonite QPQ
  • M4 Feed Ramps: Yes
  • Muzzle Thread Pattern: Permanently attached Muzzle Brake
  • Gas Port Location: Carbine
  • Exterior Diameter at Gas Port: 0.750"

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