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

$220.00

Sons of Liberty Gun Works

We look at the bolt carrier group as the heart of the gun. If the gas port is the lungs, then the bolt carrier group is the heart. It’s what drives the entire gun. If you look at the AR platform’s cycle of operations, everything happens around the bolt carrier group. Locking, unlocking, extracting, ejecting…all of it begins with the bolt carrier group.

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Out of stock

SKU: SOLGWBCG556-CHROME Category: Tags: , ,
Customer Reviews
4.8 Based on 9 Reviews
5 ★
89% 
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3 ★
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LH
06/09/2023
LOGAN H.
US US

5 stars!

it's just very very good I don't know what else to say about it

Hard Chrome Bolt Carrier Group SOLGW 5.56 158 Carpenter SP/HPT/MPI
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EV
06/08/2023
Eric V.
US US

For the love of God make more

The only problem I have is that I didn’t buy more and they are out of stock. I’ve tried every BCG out there. “Enhanced” to Mil Spec. This is the perfect blend of mil spec and “enhanced”. The Springco spring with the Chrome coating is all you need. Reliable. Very reliable. Easy to clean. No failures. Please make more!

Hard Chrome Bolt Carrier Group SOLGW 5.56 158 Carpenter SP/HPT/MPI
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DH
06/08/2023
Dom H.
US US

Mercia.

Bought it as a spare boy cause the ban in WA. It is now in my mk18 cause it just cleans and runs so damn good. Looks amazing and performs like ALL solgw gear, flawlessly. Thanks Mike and the gang.

Hard Chrome Bolt Carrier Group SOLGW 5.56 158 Carpenter SP/HPT/MPI
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DJ
06/08/2023
Daniel J.
US US

Top tier AR parts

As always the fit and finish, quality of parts and quality control is amazing. I would expect nothing less from solgw. I will continue to buy products and support a company who has this kind of quality parts and always has the end user in mind when they design parts.

Hard Chrome Bolt Carrier Group SOLGW 5.56 158 Carpenter SP/HPT/MPI
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DJ
06/08/2023
Daniel J.
US US

A thing of beauty

The chrome plating on this carrier is flawless, the finish is incredibly smooth inside and out. I hope they keep a stock of these in the future because I’m not sure I can go back to phosphate. In my opinion, the superior performance of the chrome is well worth the additional cost, buy with confidence.

Hard Chrome Bolt Carrier Group SOLGW 5.56 158 Carpenter SP/HPT/MPI
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SONS OF LIBERTY BOLT CARRIER GROUP:

Best Bolt Carrier in the industry!

Bolt:

  • Precision machined from Carpenter Technology No. 158 chrome-nickel alloy
  • Heat treated per mil-spec,
  • Shot peened per ASTM B851/SAE AMS2430S,
  • Vibratory tumbled
  • Individual high pressure/proof (HP) test
  • Full Auto test fired at 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

Extractor Spring:

  • Tactical Springs/Sprinco 5 coil, ASTM Grade A401 Chrome Silicon wire stock
  • Heat treated
  • Stress relieved, Molybdenum-Disulfide infused
  • Cryogenic processed (Hidden 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
  • Ejector Spring:
  • Heat treated
  • Mil Spec

Gas Rings:

  • Standard stainless steel per Mil-Spec X3

Carrier:

  • Machined from AISI 8620 aircraft quality 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

Gas Key:

  • Machined from 4130 Chromoly steel alloy per ASTM A108/A322-13
  • Heat-treated; hard chrome internal
  • Permatex sealed
  • Grade 8 hex screws torqued and staked Hidden per mil-spec

Cam Pin:

  • Precision machined 4340 Chromoly steel alloy per SAE AMS6415T/AMS6484D
  • Heat-treated/processed per mil-spec
  • 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

Find out why this is the Best Bolt Carrier Group in the industry. Son’s Of Liberty Gun Works

Weight 0.25 lbs
Dimensions 3 × 1 × 1 in

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