https://midstatefirearms.com/product/16-9mm-110-4150-ar15-lightweight-contour-barrel/

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16″ Lightweight Contour Barrel for ar15

  • 9mm
  • 1:10 Twist
  • 4150 Chrome Moly Steel
  • Parkerized/Phosphate Finish
  • 1/2-36 Threads