Centurion Arms Bolt Carrier Group


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Centurion Arms Bolt Carrier Group

Centurion Arms C4 Bolt Carrier Group was created with MPI tested bolts and marked to give you the ultimate confidence in your weapon system. This full auto carrier is heat treated and precision machined. The gas key is staked on both sides of both bolts.


  • Mil-spec Carpenter No. 158
  • MPI bolt (magnetic particle inspected)
  • Shot peened bolt
  • Chrome lined carrier (auto)
  • Chrome lined gas key
  • Gas key hardened to mil spec
  • Grade 8 fasteners
  • Staked gas key
  • Tool steel extractor

Additional information

Weight 16 oz
Dimensions 3 × 1 × 2 in
Thread Pitch


2 reviews for Centurion Arms Bolt Carrier Group

  1. Zach (verified owner)

    Best quality BCG for the price!

  2. Jacob Sevier (verified owner)

    Runs good with the few rounds I’ve put down range. Great fit and finish.

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