Sons of Liberty Gun Works Bolt Carrier Group for 6mm ARC & 6.5 Grendel
This Sons of Liberty Gun Works Bolt Carrier Group is designed to provide reliability and dependability in your 6mm ARC and 6.5 Grendel rifles.
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)
- 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
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THop (verified owner) –
Simply put, this bcg is a pinnacle product. Checking the measurements of this, I find every measurement to be spot on. The quality of material and craftsmanship is proven, to me, to be important to the manufacturer. The manufacturer’s product protective packaging is above any that I’m used too. Great product.