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SOLGW BCG 5.56mm/300BLK 158 Carpenter Hard Chrome Coating (R)

Sons of Liberty Gun Works looks 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, ejectingall of it begins with the bolt carrier group.

- 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.)

- 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)

- 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

- 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

Made in the USA

SOLGW BCG 5.56mm/300BLK 158 Carpenter Hard Chrome Coating (R)
SOLBCG556CGROMERegular price: $229.00Sale! $217.55
Salomon & Lowa Sale! Get 25% Off Thru 29 May - No Coupon Needed!

Items marked "(R)" No Export, No Paypal, NO EXCEPTIONS

Contact Us:
Shop Phone: 919-818-3649
Curbside Pick Up Phone: 919-594-1579
Address: 2533 Atlantic Ave, Suite 103, Raleigh, NC 27604
Phone Hours: Monday-Friday, 8am - 4pm Eastern Time (ET)
Curbside Pick Up Hours: Monday-Friday, 10am - 3pm
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