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AO Precision Enhanced Phosphate Bolt Carrier Group – 158 HPT/MPI

$99.99

Available on backorder

Description

AO PRECISION ENHANCED MIL-SPEC PHOSPHATE BOLT CARRIER GROUP – 158 HPT/MPI BCG

These Military surplus 158 Bolt carrier groups are manufactured by AO Precision to the exacting standards of the US Military. AO makes these HPT / MPI BCG’s for other Military contractor juggernauts, such as FN America. All bolts are rigorously inspected and are individually High Pressure Tested and then go through a Magnetic Particle Inspection. All springs have been replaced with Sprinco springs, specifically their 5 coil extractor spring and enhanced ejector spring.

Mil Spec Bolt

  • 158 Carpenter Steel
  • Shot Peened
  • High Pressure Tested (HPT)
  • Magnetic Particle Inspected (MPI)
  • Sprinco Enhanced Ejector Spring
  • Made from Chrome Silicon wire stock
  • Heat treated, stress relieved, and cryogenically processed
  • Much longer service life than OEM
  • Improves reliability

Mil Spec Carrier

  • 8620 Aircraft Grade Steel
  • Full Mass M-16

 

Mil Spec Extractor
  • 4140 Steel per ASTM A108, cold drawn and stress relieved BHN 187-22
  • Phosphate Finish
  • Sprinco 5 Coil Extractor Spring
  • 5 coil design
  • For AR-15 BCG
  • Made from Chrome Silicon wire stock
  • Heat treated, stress relieved, and cryogenically processed
Mil Spec Gas Key
  • 4130 Profile Extruded Steel
  • Grade 8 Hardware
  • Properly Staked
  • Chrome Lined Interior

Please note: These BCG’s are made to order and may take 5 to 7 days to ship.

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