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Sons of Liberty Gun Works
Overview
The Sons of Liberty Gun Works AR-15 5.56 Bolt Carrier Group is designed for reliable operation in 5.56 NATO caliber rifles. Its nitride finish enhances durability and provides corrosion resistance, which is crucial for maintaining performance in various conditions. This component is typically found in builds utilizing a carbine gas system, making it a great choice for those looking to optimize their rifle's functionality and longevity.
Sons of Liberty Gun Works AR-15 5.56 Bolt Carrier Group 158 Carpenter Sp/HPT/MPI
Sons of Liberty Gun Works AR-15 5.56 Bolt Carrier Group 158 Carpenter Sp/HPT/MPI ranked #18 of the 229 bolt carrier groups builders added on GunPartPicker in August 2026, behind the PSA 5.56 Premium Full Auto Bolt Carrier Group with Logo - 8779, with about 1 in every 143 bolt carrier groups added to builds. Down from #11 in June and July. Builds with this bolt carrier group are nearly all chambered in 5.56 NATO, mostly on carbine-length gas (60%, then mid-length 40%), and mostly AR-15 (91%, then AR-10 9%).
It was hard to find in August 2026, in stock on only 5 of the 25 days we checked, and today 4 of the 9 retailers we track have it in stock. The best price drifted down from $199 to $157.99 over August 2026 without a real sale. Buying today, the lowest price is $179 at BattleHawk Armory, above August's low of $157.99, so a better deal may come back.
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Sons of Liberty Gun Works Ar-15 5.56 Bolt Carrier Group 158 Carpenter Sp/hpt/mpi
| Build | Parts | Total |
|---|---|---|
 | 8 | $1705.98 |
 | 20 | $2057.52 |
 | 27 | $901.33 |
 | 23 | $2332.11 |
 | 20 | $1876.54 |
 | 27 | $3185.37 |
| 18 | $1161.33 |
 | 13 | $1979.19 |
 | 12 | $1196.39 |
| 20 | $6877.39 |
 | 22 | $2348.82 |
 | 15 | $1170.93 |
2 global ratings
Top reviews
5.56 BCG with 158 carpenter bolt, full auto carrier profile. headspace measured to spec with go and no-go gauges on my SOLGW barrel. SOLGW machining is among the cleanest in the BCG market
Sons of Liberty Gun Works 5.56 BCG uses 158 carpenter steel for the bolt with HPT/MPI testing. Cycles smoothly on a 16 inch carbine. Gas key staking is properly done. Phosphate finish on the carrier exterior holds up well.
