Geissele Automatics 5.56 Cold Hammer Forged Mid-Length Taper Profile AR-15 Barrel - Chrome Lined - 13.9"

Manufactured by Geissele Automatics
SKU: 05-2013
MPN: 05-2013
Manufactured by Geissele Automatics
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The Geissele Automatics 5.56 Cold Hammer Forged Mid-Length AR-15 Barrel is a premium barrel for the AR-15 platform. This 13.9” cold hammer forged barrel features a mid-length gas system, 1:7 twist rate and is optimized for 5.56 NATO ammo. It’s made from Chromolly steel with chrome lining and finished in manganese phosphate for a corrosion-resistant and wear-resistant surface. The Geissele taper profile promotes efficient heat dissipation, and the M4 feedramps ensure smooth feeding.


  • 13.9” CHF barrel chambered in 5.56
  • Chromolly steel construction with a manganese phosphate finish
  • Taper profile
  • Mid-length gas system
  • .750 gas block diameter
  • .081 gas port
  • 1/2x28 muzzle thread
  • 1:7 twist rate
  • M4 feedramps
  • Weight: 1.5 lbs
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Barrel CoatingManganese Phosphate
Barrel ContourTapered
Barrel Length13.9
Barrel LiningChrome
Barrel MaterialSteel
BrandGeissele Automatics
Caliber Gauge5.56 NATO
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthMid-Length
Thread Pattern1/2 X 28
Twist Rate1:7
Weight1.5 lbs
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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