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SOLGW 5.56 Bolt Carrier Group 158 Carpenter SP/HPT/MPI

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Description

  Sons of Liberty Gun Works Bolt Carrier Group HPT/MPI
Bolt:

  • Precision machined from Carpenter Technology No. 158 alloy,
  • Heat treated per mil-spec,
  • Shot peened per ASTM B851/SAE AMS2430S,
  • Vibratory tumbled
  • Individual high pressure/proof (HP)
  • Full Auto test fired as an assembly
  • Individual magnetic particle inspection ASTM E1444/E1444M (MP)
  • Markings deep laser engraved (SP=Shot Peened, HP=High Pressure Tested, MP=Magnetic Particle Inspection.)

Extractor: 

  • Precision machined from 4340 tool steel alloy per SAE AMS6415T/AMS6484D (vs 4140),
  • Heat treated
  • Shot peen per ASTM B851/SAE AMS2430S.

Extractor Retaining Pin: 

  • Precision machined and ground S7 Tool Steel
  • Heat treated per ASTM A681-08
  • Shot peened per mil-spec print
  • Manganese phosphate

Extractor Spring:

  • Tactical Springs/Sprinco 5 coil, ASTM Grade A401 Chrome Silicon wire stock
  • Heat treated
  • Stress relieved, Molybdenum-Disulfide infused
  • Cryogenic processed (all post winding)
  • Mil-spec black insert/synthetic elastomer extractor buffer (nitrile-butadiene, shore hardness 80+/-5 durometer per MIL-PRF-6855)


Ejector:

  • S7 Tool Steel
  • Heat treated per ASTM A681-08
  • Shot peened per Mil-Spec
  • Manganese phosphate

Ejector Spring: 

  • Heat treated
  • Mil Spec

Gas Rings: 

  • Standard stainless steel per Mil-Spec X3

Carrier:

  • Machined from AISI 8620 aircraft qualty alloy per ASTM A108/A322-13
  • Full auto profile
  • Heat treated
  • Carburized/strain relieved, hard chrome bore
  • Precision ground gas key interface
  • Sons of Liberty Battle Flag logo deep laser engraved
  • Manganese phosphate

Gas Key:

  •  Machined from 4130 chromoly steel alloy per ASTM A108/A322-13
  • Heat treated, hard chrome internal
  • Manganese phosphate
  • Permatex sealed
  • Grade 8  hex screws torqued and staked all per mil-spec

Cam Pin: 

  • Precision machined 4340 chromoly steel alloy per SAE AMS6415T/AMS6484D
  • Heat treated/processed per mil-spec
  • Manganese phosphate
  • Solid film lubricant applied and cured per mil-spec

Firing Pin:

  •  Precision machined 8640 steel alloy
  • Heat treated/processed per mil-spec
  • Hard chrome plate

Firing Pin Retaining Pin: 

  • Precision machined from 1038 carbon steel
  • Heat treated/processed per mil-spec
  • Manganese phosphate

Additional Details

SKU:
SOLGWBoltCarrierGroup158CarpenterSPHPTMPI

Videos

13 Reviews

  • 5
    Awesome BCG

    Published by Gary on Jan 14th 2019

    I have 2 of their BCG’s And love both of them. No issues with either on. Will be buying another for my pistol build soon. Thanks SOLGW.

  • 5
    Excellent Bcg

    Published by Aaron on Dec 24th 2018

    I've bought this for my solgw upper to go with my solgw lower and quality is excellent. Perfect stake job and it hasn't failed me yet

  • 5
    Best BCG

    Published by Jared on Aug 10th 2018

  • 5
    When It Counts

    Published by Max on Mar 13th 2018

  • 5
    Armory Excellence

    Published by Marce Strong on Jun 21st 2017

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