SOLGW - Bolt Carrier Group - The Heartbeat of the Rifle

Stick to this formula and you'll do well. Wizard piss and gimmicks come and go. Look at what's stood the test of time. Return to the fundamentals of function.

https://sonsoflibertygw.com/shop/bests-bolt-carrier-group-solgw-5-56/

Specs:

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 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
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