Sionics 11.5″ Carbine Gas Chrome Lined 5.56 NATO 1:7 Barrels


41V50, 5.56 NATO Chamber, 1:7 for 11.5”, Chrome Lined, Air-Gauged, Radiograph and MP Inspected.

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The SIONICS Weapon Systems 11.5” AR-15 Chrome Lined Barrel is machined from 41V50 Chrome Moly Vanadium Steel. It features a Medium Contour with a Carbine-Length Gas System and a .750″ Gas Seat Diameter. All SIONICS Barrels feature Hand Polished Feed Ramps and go through a rigorous QC process. Furthermore, every SIONICS barrel is Radiograph Inspected at an FAA Certified Laboratory. The 1/7 Twist Rate is great for an all around build. The muzzle is threaded 1/2×28 for use with any 5.56/.223 muzzle device. The barrel is Manganese Phosphate coated and Magnetic Particle Inspected. The SIONICS 11.5″ Chrome Lined AR-15 Barrel is great for a general purpose pistol or SBR. Lastly, the barrel comes Pre-Dimpled for easy installation of the Gas Block.


  • 11.5” Chambered in 5.56 NATO
  • 41V50 CMV Steel
  • Manganese Phosphate Coated
  • Chrome Lined
  • Medium Profile
  • .750″ gas seat diameter
  • 1/7 Twist Rate
  • Carbine Gas System
  • Magnetic Particle Inspected
  • Weight: 1 Lb. 6 oz.
  • Radiograph Inspected
  • Threaded 1/x28
  • Feed Ramps Hand Polished
  • Pre-Dimpled for easy Gas Block Installation

Port Options:

–  Standard Port – Great for Un-Suppressed or suppressed use

– Reduced Gas Port: Will run both suppressed and unsuppressed.

– Extreme Reduced Port – Great for SUPPRESSED ONLY use and will minimize gas blowback, felt recoil, wear and tear on internals and carbon buildup on internals. Pistol will ship with a rubber thread protector instead of an A2 flash hider in this configuration. *Will possibly run unsuppressed depending on ammo and tuning.*

– Reduced Gas Port: Will run both suppressed and unsuppressed.

– Silencer Dedicated Gas Port: Will ONLY run suppressed.

Additional information

SWS Ports

Extreme Reduced Gas Port (ERGP), Reduced Gas Port (RGP), Silencer Dedicated (SD), Standard Port


Sionics Weapon Systems


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