SOLGW 5.56 Bolt Carrier Group 158 Carpenter SP/HPT/MPI | Sons Of Liberty Gun Works BCG

SOLGW 5.56 Bolt Carrier Group 158 Carpenter SP/HPT/MPI | Sons Of Liberty Gun Works BCG

MSRP: $199.00
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$179.00

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(107 customer reviews)

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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 information

Weight 8 oz
Dimensions 6 × 4 × 3 in

107 reviews for SOLGW 5.56 Bolt Carrier Group 158 Carpenter SP/HPT/MPI | Sons Of Liberty Gun Works BCG

  1. zstovall84 (verified owner) –

    I don’t think you can beat the quality you get, for the amount you pay, when it comes to these BCGs. I have several and will keep buying more.

  2. Brian (verified owner) –

    Lifetime warranty and amazing function cant go wrong with solgw

  3. libertypraxis (verified owner) –

    Excellent BCG. Obviously test fired, as advertised. Everything appears to be perfectly in spec and I’m actually seeing a better ejection pattern than I was getting from the BCG I replaced with this. Will definitely get another one, especially if BTO lures me in with another sweet deal…

  4. jzak4083 (verified owner) –

    I’d like to say how impressed I am with Big Tex Ordnance. In a time where it seems everything and anything related to customer service is broken Big Tex Ordnance shines. My order was literally processed and shipped the day it was placed and I received my order in just two short days. Big Tex Ordnance kept me posted every step of the way. I’ve found my new company for gun related components. I can’t say enough about my first experience. My order came packaged properly with zero damage. I received what I ordered and the BCG will work perfectly when I need it. GREAT job BTO!!!

  5. joeyjan (verified owner) –

    Cant beat a LIFETIME WARRANTY!! Functions great!! i need another

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