Centurion Arms C4 5.56 M16 Bolt Carrier Group

Manufactured by Centurion Arms
Manufactured by Centurion Arms
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The Centurion Arms C4 Bolt Carrier Group features an M16 profile and is full auto tested to ensure a lifetime of reliability. The bolt head is machined from Carpenter 158 steel and is magnetic particle inspected. The face of the bolt has been shot peened to disrupt the flat surface on a microscopic level to increase strength for dealing with the high pressures of 5.56 ammo. The tool steel extractor is made to withstand thousands and thousands of rounds without breaking. The internals of the carrier and gas key are chrome lined to prevent erosion of the steel from hot expanding gasses. The gas key is attached with grade 8 screws and staked to prevent them from walking out.

  • M16 profile
  • Full auto rated
  • Carpenter 158 bolt
  • Shot peened
  • Magnetic particle inspected
  • Chrome lined internals
  • Properly staked grade 8 gas key screws
  • Tool steel extractor
  • Phosphate coating
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Bolt FinishManganese Phosphate
Bolt MaterialCarpenter 158 Steel
BrandCenturion Arms
Caliber Gauge.223/5.56
Carrier FinishManganese Phosphate
Carrier StyleM16 Bolt Carrier
High Pressure TestedUntested
Magnetic Particle InspectMagnetic Particle Inspected

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

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