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SOLGW Bolt Carrier Group
$179.00
Sons of Liberty Gun Works (SOLGW) 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, ejecting…all of it begins with the bolt carrier group.
6 in stock
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
What is the Drive Lock System?
The Drive Lock System is a Patent-Pending design based on a Hodge defense Extrusion that uses a system of wedges that interface with the barrel nut and “drive” it towards the upper receiver as it is tightened. This system clamps on to the barrel nut with extreme force and precision, providing an extremely robust mounting platform.
SOLGW M89 vs L89
What’s the Difference between the M89 and L89?
While both handguards use the patent-pending Drive Lock System, there are a few notable differences that may lead someone to choosing one over the other:
- The most noticeable difference is the M-LOK Slots. The L89 features 7 sided M-LOK slots, whereas the M89 retains more substantial cutouts for cooling around the handguard, reducing the quantity of M-LOK slots
- The L89 has an internal QD sling swivel socket built in to the rear of the handguard, whereas the M89 must use an M-LOK QD sling swivel socket
- The L89 features a titanium barrel nut, which is going to save a good amount of weight compared to the steel barrel nut in the M89 handguard
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