Sons of Liberty Gun Works Bolt Carrier Group
The Sons of Liberty Gun Works Bolt Carrier Group features an M16 profile and is tested to ensure a lifetime of reliability.
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
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(verified owner) –
The BCG works as expected a great product from a great brand. Rooftop Defense has great service and fast shopping! I will order all that I can from them.
Rob W. (verified owner) –
First order from Rooftop Defense, I’m very pleased. Will be doing business with this company again. Fast shipping and tracking was excellent. SOLGW Bcg is great!
Arturo M. (verified owner) –
Great service from great company. Ordered item arrived quickly and i was sent accurate shipping details as item made it way over to me. Very satisfied.
BCG is great quality and will fit nicely into Geissele pistol I am building.
Juan F Z. (verified owner) –
You can’t say much negative about SOLGW products. They perform as expected every time. Also, Kudos to the folks at rooftop defense! Quick shipping and awesome customer service. I would absolutely order from them again.
Julian E. (verified owner) –
This is a win – win purchase. Great product from an amazing company. You can’t go wrong with this BCG. Ya can’t forget about the amazing customer support and the blazing fast shipping that you’ll also recieve with this purchase.