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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. Ergo M4 Receiver Castle Nut, Black

    Ergo M4 Receiver Castle Nut, Black

    Rating:
    100%
    (1)
    Regular Price $8.99 Special Price $7.99
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  2. JP Enterprises Enhanced Carbine Buttstock Castle Nut, Black

    JP Enterprises Enhanced Carbine Buttstock Castle Nut, Black

    Regular Price $17.99 Special Price $15.99
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  3. Forward Controls Design CN5F A5 Castle Nut, Burnt Bronze

    Forward Controls Design CN5F A5 Castle Nut, Burnt Bronze

    Regular Price $36.99 Special Price $32.99
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  4. Sons of Liberty Gun Works Castle Nut, Black

    Sons of Liberty Gun Works Castle Nut, Black

    $9.99
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  5. Forward Controls Design CNF Billet Castle Nut, OD Green

    Forward Controls Design CNF Billet Castle Nut, OD Green

    Regular Price $32.99 Special Price $28.99
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  6. Timber Creek Castle Nut, Black

    Timber Creek Castle Nut, Black

    Rating:
    100%
    (1)
    Regular Price $5.99 Special Price $4.99
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  7. 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:
    87%
    (15)
    Regular Price $3.99 Special Price $3.59
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  8. 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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  9. 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

    Rating:
    100%
    (2)
    $35.95
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  10. 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

    Rating:
    100%
    (3)
    Regular Price $64.99 Special Price $57.99
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  11. 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

    Regular Price $66.99 Special Price $59.99
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  12. 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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  13. 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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  14. CMMG Receiver Extension Nut, Mk4 - 55CA9CB

    CMMG Receiver Extension Nut, Mk4 - 55CA9CB

    Regular Price $9.99 Special Price $8.79
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  15. 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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  16. Fortis Lightweight Enhanced AR-15 End Plate, Black - LE-BLK-K1-BLK

    Fortis Lightweight Enhanced AR-15 End Plate, Black - LE-BLK-K1-BLK

    Rating:
    100%
    (2)
    Regular Price $49.99 Special Price $44.99
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  17. LBE Unlimited Manganese Phosphate Coated AR-15 Castle Nut, Black - ARCNUT

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

    Regular Price $7.99 Special Price $7.09
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  18. 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 $7.99 Special Price $6.69
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  19. Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE

    Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE

    Rating:
    97%
    (6)
    Regular Price $81.99 Special Price $59.99
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  20. Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Red

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

    $59.95
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  21. Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Blue

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

    $59.95
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  22. 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 $64.99 Special Price $57.99
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  23. Lead Star Arms Aluminum MIL-SPEC Castle Nut, Black

    Lead Star Arms Aluminum MIL-SPEC Castle Nut, Black

    Out of Stock
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  24. Forward Controls Design CN5F A5 Castle Nut, OD Green

    Forward Controls Design CN5F A5 Castle Nut, OD Green

    Out of Stock
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