Axolotl Arms Engraved AO Precision Mil-Spec 5.56 Bolt Carrier Group

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True Mil-Spec AR-15 BCG 5.56!

SKU AO556BCGAxoLogo Category

Axolotl Arms Engraved AO Precision Mil-Spec 5.56 Bolt Carrier Group

$119.69

6 in stock

Description

Axolotl Arms Engraved Logo AO Precision True Mil-Spec SP/HPT/MPI 5.56 Bolt Carrier Group – BCG556

True Mil-Spec BCG. Each and every bolt, test fired from the factory.

Bolt

  • Machined from Carpenter Technology No. 158 alloy.
  • Heat treated
  • Shot peened per ASTM B851/SAE AMS2430S
  • Individually High Pressure Tested (test fired)
  • HP proof testing, 100% using a high pressure M197 or SAAMI commercial equivalent, without evidence of failure
  • Individually Magnetic Particle Inspected after Initial Test Fire
  • Manganese Phosphate Finish

Extractor

  • 4140 Steel per ASTM A108, cold drawn and stress relieved BHN 187-22
  • Manganese Phosphate Finish
  • Extractor Spring
  • Black Extractor Insert
  • Viton O-Ring

Carrier

  • Machined from AISI 8620 aircraft quality alloy per ASTM A108/A322-13
  • Full Mass M16 Profile
  • Stress Relieved
  • Hard Chrome Bore

Gas Key

  • Machined from 4130 chromoly steel alloy per ASTM A108/A322-13
  • Grade 8 Hardware
  • Properly Staked
  • Hard Chrome Internal
  • Permatex sealed
ADDITIONAL INFORMATION
WEIGHT 11.52 oz
BOLT MATERIAL Carpenter 158 Steel
CARTRIDGE COMPATIBILITY .223/5.56 NATO/.300 BLK
FINISH Mag Phosphate
CARRIER PROFILE M16
HIGH PRESSURE TESTED HP Tested
MAGNETIC PARTICLE INSPECTED Magnetic Partical Inspected
PLATFORM AR-15
BOLT FINISH Mag Phosphate
MPN BCG556
UPC 4494

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