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M16 Bolt Carrier Group C-158 Bolt — Chrome-Lined, Billet Extractor, 5.56, Manganese Phosphate

(1 review) Write a Review
$149.95
SKU:
2009-0807-003
M16 Bolt Carrier Group—C158 Bolt, Chrome-Lined, Billet Extractor, 5.56, Manganese Phosphate from Outerwild
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This carrier is machined by Outerwild from Mil-Spec 8620 Steel with a Manganese Phosphate finish that provides long-lasting resistance to corrosion. The interior is hard chrome lined creating a mirror-like, exceptional finish that is trusted by seasoned shooters and depended on by experienced builders. Outerwild’s secret sauce for our favored BCGs is that they are PRECISION GROUND. We machine and grind our BCGs to perform for tens of thousands of rounds. We grind the outside dimensions and ALL three interior dimensions of our carrier, giving our BCGs a near friction-less surface finish. 

 

  • M16 Style Carrier
    • Machined from 8620 Steel
    • Chrome-Lined
    • Heat Treated
    • Final Grind Before Plating
    • Manganese Phosphate Finish
  • Carpenter 158 Bolt 5.56/.223 Bolt
    • Heat Treated
    • Shot Peened
    • MPI Tested (Magnetic Particle Inspection)
    • Phosphate Finish
  • Billet Gas Key
    • Machined from Solid Billet of 4130 Steel
    • Chrome-Lined
    • Properly Seated with Grade 8 Fasteners
    • Properly Staked
    • Manganese Phosphate Finish
  • Cam Pin
    • Machined from 4140 Steel
    • Heat Treated
    • Manganese Phosphate Finish
  • Billet Extractor
    • Machined from Solid Billet of 4140 Steel
    • Heat Treated
    • Shot Peened
    • Phosphate Coated
    • Extractor Insert Included
    • Viton O-Ring Included
  • Firing Pin 
    • Machined from 8640 Steel
    • Hard Chrome Plated
  • 100% American Made
  • 5
    M16 BOLT CARRIER GROUP C-158 BOLT—CHROME-LINED, BILLET EXTRACTOR, 5.56, MANGANESE PHOSPHATE

    Posted by J.K on Mar 21st 2023

    Simply put, this BCG is fantastic! When I received this BCG, I gauged several areas of the bolt and the carrier such as the bolt shoulder, tail, the 3 bores of the carrier, etc. I expected the BCG to be “in spec” but I wanted to see how good the tolerances were to check the gas efficiency of the BCG. I cannot speak for every unit, however I can confidently say that the BCG I received was great both fit and finish. As expected, their customer support and shipping speed was amazing! Highly recommended!

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