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AR-15 Upgrade Kits

When it's time to take your AR-15 to the next level, shop Palmetto State Armory for some of the best AR-15 upgrade kits. Here you can find kits from brands like Lead Star Arms, KNS Precision, PSA Custom. Upgrade your investment today!

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Items 1-24 of 157

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  1. Lantac M-SPEC LPK. AR15 Lower Parts Kit

    Lantac M-SPEC LPK. AR15 Lower Parts Kit

    Regular Price $49.99 Special Price $44.99
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  2. ALG Defense Inc Complete Mil-Spec Lower Parts Kit w/ACT Trigger

    ALG Defense Inc Complete Mil-Spec Lower Parts Kit w/ACT Trigger

    $110.99
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  3. ALG Defense Inc Complete Mil-Spec Lower Parts Kit w/QMS Trigger and Grip

    ALG Defense Inc Complete Mil-Spec Lower Parts Kit w/QMS Trigger and Grip

    Regular Price $107.99 Special Price $97.99
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  4. ALG Defense Inc Complete Mil-Spec Lower Parts Kit w/QMS Trigger

    ALG Defense Inc Complete Mil-Spec Lower Parts Kit w/QMS Trigger

    Regular Price $104.99 Special Price $94.99
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  5. Geissele Standard Lower Parts Kit, Black

    Geissele Standard Lower Parts Kit, Black

    Rating:
    100%
    (1)
    Regular Price $69.99 Special Price $62.99
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  6. Next Level Armament - AR15 Lower Parts Kit - Mil-Spec - NLX662

    Next Level Armament - AR15 Lower Parts Kit - Mil-Spec - NLX662

    Rating:
    100%
    (2)
    Regular Price $71.99 Special Price $63.99
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  7. KAK Industry Lower Parts Kit

    KAK Industry Lower Parts Kit

    Rating:
    98%
    (24)
    Regular Price $11.99 Special Price $9.99
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  8. KAK Industry Basic Build Kit

    KAK Industry Basic Build Kit

    Rating:
    76%
    (16)
    Regular Price $28.99 Special Price $25.99
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  9. KAK Industry Lower Parts Kit Fits AR-15 Lower Receivers

    KAK Industry Lower Parts Kit Fits AR-15 Lower Receivers

    Rating:
    24%
    (10)
    Regular Price $57.99 Special Price $51.99
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  10. Xtech Tactical Lower Parts Kit, Black

    Xtech Tactical Lower Parts Kit, Black

    Rating:
    60%
    (1)
    Regular Price $76.99 Special Price $68.99
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  11. Midwest Industries Drop-In Trigger w/Lower Parts Kit, Black

    Midwest Industries Drop-In Trigger w/Lower Parts Kit, Black

    Regular Price $289.99 Special Price $260.99
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  12. Black Rain Ordnance Lower Parts Kit, Black

    Black Rain Ordnance Lower Parts Kit, Black

    Rating:
    100%
    (1)
    Regular Price $64.99 Special Price $58.99
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  13. TacFire Lower Parts Kit, Black

    TacFire Lower Parts Kit, Black

    Rating:
    100%
    (1)
    Regular Price $47.99 Special Price $42.49
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  14. Sons of Liberty Gun Works Blaster Guts Semi-Auto Lower Parts Kit, Black - Essential Kit for Semi-Auto Performance - BG

    Sons of Liberty Gun Works Blaster Guts Semi-Auto Lower Parts Kit, Black - Essential Kit for Semi-Auto Performance - BG

    Regular Price $134.99 Special Price $120.99
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  15. Timber Creek Outdoors AR Lower Parts Kit for AR-15, Robin's Egg Blue - AR LPK RE

    Timber Creek Outdoors AR Lower Parts Kit for AR-15, Robin's Egg Blue - AR LPK RE

    Rating:
    90%
    (2)
    Regular Price $89.99 Special Price $80.99
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  16. Geissele Automatics Ultra Duty Lower Parts Kit - Desert Dirt Reliability - 05-435S

    Geissele Automatics Ultra Duty Lower Parts Kit - Desert Dirt Reliability - 05-435S

    Regular Price $176.99 Special Price $158.99
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  17. Harrington & Richardson M16A2 Lower Parts Kit, Gray

    Harrington & Richardson M16A2 Lower Parts Kit, Gray

    Rating:
    87%
    (6)
    $74.99
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  18. Harrington & Richardson M16A1 Lower Parts Kit

    Harrington & Richardson M16A1 Lower Parts Kit, Gray

    Rating:
    90%
    (23)
    $74.99
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  19. Geissele Ultra Duty Lower Parts Kit, Black - 05-435B

    Geissele Ultra Duty Lower Parts Kit, Black - 05-435B

    Rating:
    90%
    (4)
    Regular Price $170.99 Special Price $153.99
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  20. Timber Creek Lower Parts Kit, Blue

    Timber Creek Lower Parts Kit, Blue - AR LPK B

    Regular Price $108.99 Special Price $79.99
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  21. Timber Creek Lower Parts Kit, Tungsten

    Timber Creek Lower Parts Kit, Tungsten - AR LPK T

    Regular Price $89.99 Special Price $80.99
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  22. PSA Classic Lower Parts Kit, ODG

    PSA Classic Lower Parts Kit, ODG

    Rating:
    84%
    (10)
    $49.99
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  23. PSA Classic Lower Parts Kit, FDE

    PSA Classic Lower Parts Kit, FDE

    Rating:
    98%
    (17)
    $49.99
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  24. Timber Creek AR-15 Lower Parts Kit, OD Green

    Timber Creek AR-15 Lower Parts Kit, OD Green - AR LPK OD

    Regular Price $89.99 Special Price $80.99
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