Sons of Liberty Gun Works Castle Nut Class 3B Threads Black
Sons Of Liberty Gun Works · Buffer Tubes & Springs
No ratings yetBest price
$25.00at Kentucky Gun Co
In stock checked Oct 31, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Kentucky Gun Co Best price | $25.00checked Oct 31, 2026 | In stock | Buy at Kentucky Gun Co | |
| Ammunition Depot | $31.49checked Oct 31, 2026 | In stock | Buy at Ammunition Depot | |
| OpticsPlanet | $33.49Salechecked Oct 31, 2026 | In stock | Buy at OpticsPlanet | |
| Battlehawk Armory | $25.00checked Oct 31, 2026 | Check store | Buy at Battlehawk Armory |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $25.00 at Kentucky Gun Co. Dashed line = out of stock. Tracking since Oct 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $31.49 | $31.49 | $31.49 |
| Battlehawk Armory | $25.00 | $25.00 | $25.00 |
| Kentucky Gun Co | $25.00 | $25.00 | $25.00 |
| OpticsPlanet | $33.49 | $33.49 | $33.99 |
Since Oct 28, 2026.
About this part
The Sons of Liberty Gun Works Castle Nut Class 3B Threads Black is a buffer part from Sons Of Liberty Gun Works. It's sold by 4 stores (3 in stock), from $25.00 to $33.49. The lowest in-stock price in the last 30 days was $25.00 at Kentucky Gun Co.
Specifications
- Manufacturer
- Sons Of Liberty Gun Works
- Material
- Steel
From the manufacturer
Sons of Liberty Gun Works Castle Nut Class 3B Threads Black. The SOLGW Castle Nut is made from 17-4 Stainless steel which is nitride treaded for maximum corrosion resistance. The face of our Castle Nut is ground flat for maximum surface contact with an end plate and features 6 deep staking recesses for maximum material displacement and more holding force than previously possible. The rear is also beveled between the drive notches for comfort. The SOLGW Castle Nut is machined with Class 3B threads for maximum thread engagement and rock solid security. Lastly the Castle Nut is extended beyond the typical mil-spec length for added material strength at the junction of the lower and the receiver extension (buffer tube); a potential weak spot. This makes it compatible with Intermediate/A5 length extensions only as it may prevent some stocks from fully collapsing on carbine length tubes. Specifications for Sons of Liberty Gun Works Castle Nut: Manufacturer: Sons of Liberty Gun Works Gun Model: AR-15 Color: Black Fabric/Material: 17-4 Stainless Steel Finish: Nitride Features of Sons of Liberty Gun Works Castle Nut 17-4 Stainless Steel Nitride Treated Class 3B threads 6 Deep staking notches Extended Length Package Contents: Sons of Liberty Gun Works Castle Nut What firearm models does the manufacturer say Sons of Liberty Gun Works Castle Nut is compatible with? The manufacturer suggests that Sons of Liberty Gun Works Castle Nut is compatible with AR-15Sons of Liberty Gun Works SOLGW-CASTLENUT: Castle Nut Class 3B Threads Black
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