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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

22 Reviews

  • 5
    BadassBCG

    Published by Daniel Martinez on Apr 15th 2019

    Swapped out a price-focused BCG for this one. No sticks no lock ups on that bargain basement model. This is worth every penny and it looks good too. Recommend this to anyone needed reliability. Running on my Spikes 300Blk

  • 5
    BCG

    Published by Shane Bertrand on Apr 9th 2019

    This BCG is one of the best built I have seen in a while. I have quite a few from other manufacturers and the quality of this BCG is above and beyond. I'll be buying more in the future.

  • 5
    AWESOME BCG!!!!! BEST IN THE BIZ

    Published by SK on Apr 9th 2019

    Your not going to find a better BCG for the money.

  • 5
    One Of The Best

    Published by Jason Williams on Apr 6th 2019

    Got a SOLGW BCG and have used pretty much every type of 223/556 ammo with it and it has ran flawlessly with very minimal wear. If you want a BCG that you can count on, don’t hesitate to get a SOLGW BCG.

  • 5
    Good but...

    Published by James on Apr 5th 2019

    Directions unclear. Dick got stuck in bolt carrier group.

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