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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

32 Reviews

  • 5
    Great BCG!

    Published by Ryan Merritt on Aug 19th 2019

    Great BCG, fast delivery, great packaging, came oiled and sealed in plastic. Can't beat the quality and warranty!

  • 5
    BCG

    Published by Zane on Aug 1st 2019

    Good stuff as always. I have faith this will not let me down when I need it.

  • 5
    Bolt carrier group

    Published by Sean Rose on Jul 11th 2019

    Excellent product, fast shipping, thank you!

  • 5
    Quality Product

    Published by cooper Kimble on Jul 8th 2019

    One of the best BCGs money can buy. I currently have these in most of my ARs

  • 5
    Mighty Fine BCG

    Published by kevin b on Jul 6th 2019

    Picked one up for a new build. Well made, properly staked gas key and all the right specs. Can't go wrong with this one.

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