SOLGW Bolt Carrier Group 5.56/300BLK Carpenter 158 SP/HPT/MPI
Original price was: $199.00.$179.00Current price is: $179.00.
Check product description for current lead time.
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.
Works for 5.56 NATO, .300 Blackout, 6mm MAX and .350 Legend cartridges.
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
- 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 (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
- 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 Hidden 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
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 |
- Reviews
- Questions
USIt work flawlessly Only run a 100 rounds through it So far
USSons of Liberty_ BCG
I have updated a Sig Sauer M400, .223/5,56, AR 15, I purchased your SOL M4-89, (complete upper) .300 Blackout, but the BCG that the Sig Sauer had was only made for AR 15 (shorter). Your famous BCG is M 16. Have a CMMG BCG for spare and I have a Springfield Saint .223/5.56. End of story.
USGreat BCG
Will buy again if I need another BCG. Built from premium materials
USAwesome BCG
Just purchased this bag and everything gauges perfectly and runs great in the gun.
USBCG
Upgraded the BCG on the PSA 10.5 CAR I bought. I have yet to shoot it, but what I will tell you is the machining quality right out of the box is tremendous. ALSO, shoutout to SOLGW for NOT using their DBA on the shipping label, smooth move guys thank you.
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