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AR Castle Nuts

Palmetto State Armory has a large selection of AR Castle Nuts to fully support your upgrade and build needs. Count on Palmetto State Armory to provide the right parts at the right price from the best brands.

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  1. Lead Star Arms Aluminum MIL-SPEC Castle Nut, Black

    Lead Star Arms Aluminum MIL-SPEC Castle Nut, Black

    Regular Price $14.99 Special Price $9.99
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  2. Timber Creek Castle Nut, Black

    Timber Creek Castle Nut, Black

    $4.99
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  3. Tacfire Buffer Tube Castle Nut for AR-15 - Black, Essential for Assembly - MAR039

    Tacfire Buffer Tube Castle Nut for AR-15 - Black, Essential for Assembly - MAR039

    Rating:
    80%
    (3)
    Regular Price $3.99 Special Price $3.59
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  4. Strike Industries End Plate and Anti-Rotate Castle Nut for Receivers - SI-AR-UL-MFEP&ACN-FDE

    Strike Industries End Plate and Anti-Rotate Castle Nut for Receivers - SI-AR-UL-MFEP&ACN-FDE

    Regular Price $39.99 Special Price $35.99
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  5. Strike Industries TRIBUS Version 2 Castle Nut and End Plate for Buffer Tubes - SI-AR-TRIBUS-BK

    Strike Industries TRIBUS Version 2 Castle Nut and End Plate for Buffer Tubes - SI-AR-TRIBUS-BK

    $57.95
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  6. Strike Industries TRIBUS Version 2 Castle Nut and End Plate for Buffer Tubes - SI-AR-TRIBUS-BLU

    Strike Industries TRIBUS Version 2 Castle Nut and End Plate for Buffer Tubes - SI-AR-TRIBUS-BLU

    $59.95
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  7. Strike Industries TRIBUS Version 2 Castle Nut and End Plate for Buffer Tubes, Red - SI-AR-TRIBUS-RED

    Strike Industries TRIBUS Version 2 Castle Nut and End Plate for Buffer Tubes, Red - SI-AR-TRIBUS-RED

    $59.95
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  8. Flat Dark Earth Brilliance Strike Industries TRIBUS V2 Castle Nut and End Plate - SI-AR-TRIBUS-FDE

    Flat Dark Earth Brilliance Strike Industries TRIBUS V2 Castle Nut and End Plate - SI-AR-TRIBUS-FDE

    $59.95
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  9. CMMG Receiver Extension Nut, Mk4 - 55CA9CB

    CMMG Receiver Extension Nut, Mk4 - 55CA9CB

    Regular Price $8.99 Special Price $7.99
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  10. Fortis Light Weight K2, Castle Nut and End Plate, Black, Anodized Finish

    Fortis Light Weight K2, Castle Nut and End Plate, Black, Anodized Finish

    Regular Price $56.95 Special Price $54.10
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  11. Fortis Light Weight K1 Castle Nut and End Plate Black, Flat Dark Earth - LEBLKK1FDE

    Fortis Light Weight K1 Castle Nut and End Plate Black, Flat Dark Earth - LEBLKK1FDE

    Regular Price $46.95 Special Price $44.60
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  12. Luth-AR Carbine Lock Ring Castle Nut - CS-02

    Luth-AR Carbine Lock Ring Castle Nut - CS-02

    Rating:
    100%
    (1)
    Regular Price $5.99 Special Price $4.99
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  13. LBE Unlimited Manganese Phosphate Coated AR-15 Castle Nut, Black - ARCNUT

    LBE Unlimited Manganese Phosphate Coated AR-15 Castle Nut, Black - ARCNUT

    Regular Price $6.99 Special Price $5.69
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  14. ATI Outdoors Castle Nut for AR-15/AR-10 Rifles, Black - A5101020

    ATI Outdoors Castle Nut for AR-15/AR-10 Rifles, Black - A5101020

    Rating:
    100%
    (3)
    Regular Price $9.99 Special Price $8.29
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  15. PSA Custom AR-15 Lightweight Aluminum Castle Nut

    PSA Custom Lightweight Aluminum Castle Nut - 116018

    Rating:
    98%
    (21)
    Regular Price $10.95 Special Price $9.85
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  16. Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Black

    Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Black - SI-AR-ECN&EEP-BK

    Rating:
    80%
    (1)
    Regular Price $78.99 Special Price $57.99
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  17. PSA AR-15 Car Stock Lock Ring and Castle Nut

    PSA AR15 CAR Stock Lock Ring/Castle Nut - 412

    Rating:
    97%
    (27)
    $2.99
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  18. Primary Weapons Systems EBT Mod 2 End Plate and Ratchet Lock Castle Nut, Black

    Primary Weapons Systems EBT Mod 2 End Plate and Ratchet Lock Castle Nut, Black

    Out of Stock
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  19. Anderson Manufacturing Castle Nut For 6-Position Carbine-Length Buffer Tube, Black

    Anderson Manufacturing Castle Nut For 6-Position Carbine-Length Buffer Tube, Black

    Rating:
    96%
    (5)
    Out of Stock
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  20. Daniel Defense Castle Nut, Black

    Daniel Defense Castle Nut, Black

    Out of Stock
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  21. Forward Controls Design CNF Castle Nut Improved Staking Notches - CNF-BLK

    Forward Controls Design CNF Castle Nut Improved Staking Notches - CNF-BLK

    Out of Stock
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  22. Ergo Castle Nut for AR-15 - Secure Your AR Build with Precision in Black - 4971-(B)

    Ergo Castle Nut for AR-15 - Secure Your AR Build with Precision in Black - 4971-(B)

    Out of Stock
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  23. Strike Industries End Plate and Anti-Rotate Castle Nut for Receivers, Red - SI-AR-UL-MFEP&ACN-RED

    Strike Industries End Plate and Anti-Rotate Castle Nut for Receivers, Red - SI-AR-UL-MFEP&ACN-RED

    Out of Stock
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  24. ET Arms Inc Mil-Spec Buffer Tube Ambi Plate Castle Nut for AR-15, Black - ETAMILCARTUBE

    ET Arms Inc Mil-Spec Buffer Tube Ambi Plate Castle Nut for AR-15, Black - ETAMILCARTUBE

    Out of Stock
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