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Aero Upper Receiver + AO Precision Premium 158 MPI/HPT Bolt Carrier Group

Aero Upper + AO Precision Phos BCG

MSRP $210.00
SALE PRICE: $139.99
Savings: $70.01


Stock Status :(Out of Stock)
Product Code: AOM16-HPT-MPI-APAR501603C

Add RCA Adjustable Gas Key?

Add Port Door & Forward Assist?

See "CHART A" tab below:

Engrave Your Upper?

See "CHART B" tab below:

Description CHART A CHART B

Aero Upper Receiver + AO Precision Premium 158 MPI/HPT Bolt Carrier Group

Save big on this Aero Stripped Upper + AO Precision Premium 158 MPI/HPT BCG Combo!

AO Phosphate 158 MPI HPT 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.

Mil Spec Bolt

  • 158 Carpenter Steel
  • Shot Peened
  • High Pressure Tested (HPT)
  • Magnetic Particle Inspected (MPI)

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
  • Extractor Spring
  • Black Extractor Insert
  • Viton O-Ring

Mil Spec Gas Key

  • 4130 Profile Extruded Steel
  • Grade 8 Hardware
  • Properly Staked
  • Chrome Interior

Aero Stripped M4 Upper Receiver:
  • Anodized - Black
  • AR-15
  • 7075-T6 Aluminum
  • A3 Flat Top
  • Forged
  • M4 Feedramps
  • T-Marks

Add a plain or engraved port door + forward assist kit from the drop down menu.

Choose one of our upper engraving graphics from the drop down menu.

See reference "CHART A" and "CHART B" tabs above.

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