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AR-15 Lower Build Kits & Parts Kits

Shop AR-15 lower build kits with the components needed to complete or upgrade your lower receiver. Choose from kits featuring stocks, triggers, pistol grips, buffer assemblies, lower parts, and other compatible components. Browse AR-15 lower build kits in multiple configurations to find the right setup for your next custom build. Explore PSA's extensive line of AR-15 Lowers. 

AR-15 Kits

AR-15 Kits
Lowers

Lowers
Lower Build Kits

Lower Build Kits
Lower Parts Kits

Lower Parts Kits
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Items 25-48 of 372

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  1. PSA JAKL-10 EPT MIAD B&T Lower Build kit, Black

    PSA JAKL-10 EPT MIAD B&T Lower Build kit, Black

    Rating:
    73%
    (3)
    $299.99
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  2. PSA JAKL-10 EPT MIAD B&T Lower Build kit, FDE

    PSA JAKL-10 EPT MIAD B&T Lower Build kit, FDE

    $299.99
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  3. PSA JAKL-10 EPT MIAD F5 Lower Build kit, Black

    PSA JAKL-10 EPT MIAD F5 Lower Build kit, Black

    Rating:
    60%
    (1)
    $299.99
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  4. PSA JAKL-10 EPT MIAD F5 Lower Build kit, FDE

    PSA JAKL-10 EPT MIAD F5 Lower Build kit, FDE

    Rating:
    88%
    (5)
    $299.99
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  5. 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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  6. 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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  7. TacFire Lower Parts Kit Fits Glock G19, Black

    TacFire Lower Parts Kit Fits Glock G19, Black

    Rating:
    80%
    (4)
    Regular Price $42.99 Special Price $37.89
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  8. PSA A2 Classic Rifle Lower Build Kit, ODG

    PSA A2 Classic Rifle Lower Build Kit, ODG

    Rating:
    97%
    (19)
    $119.99
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  9. PSA A2 Classic Rifle Lower Build Kit, FDE

    PSA A2 Classic Rifle Lower Build Kit, FDE

    Rating:
    96%
    (14)
    $119.99
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  10. Strike Industries Enhanced AR-10 Lower Parts Kit Fits Knight's Armament SR25, Black - Complete Parts Kit Fits AR-10 Performance - SI-AR10-E-LRPLT

    Strike Industries Enhanced AR-10 Lower Parts Kit Fits Knight's Armament SR25, Black - Complete Parts Kit Fits AR-10 Performance - SI-AR10-E-LRPLT

    Regular Price $59.99 Special Price $53.99
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  11. 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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  12. PSA JAKL Rifle Lower Build Kit MOE SL EPT B&T Stock, FDE

    PSA JAKL Rifle Lower Build Kit MOE SL EPT B&T Stock, FDE

    Rating:
    40%
    (1)
    $249.99
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  13. PSA JAKL Rifle Lower Build Kit MOE SL EPT B&T Stock, Black

    PSA JAKL Rifle Lower Build Kit MOE SL EPT B&T Stock, Black

    Rating:
    93%
    (3)
    $249.99
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  14. PSA B5 Systems Lower Build Kit with Bravo Stock, Coyote

    PSA B5 Systems Lower Build Kit with Bravo Stock, Coyote

    Rating:
    97%
    (23)
    $129.99
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  15. Palmetto State Armory A2 Rifle Lower Build Kit, Black

    Palmetto State Armory A2 Rifle Lower Build Kit, Black

    Rating:
    90%
    (2)
    $119.99
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  16. PSA AR15 MOE Lower Build Kit W/PSA Custom Single Stage FCG, Black

    PSA AR15 MOE Lower Build Kit W/PSA Custom Single Stage FCG, Black

    Rating:
    89%
    (9)
    $179.99
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  17. PSA PA10 STR Two Stage Trigger Lower Build Kit W/Overmolded Grip

    PSA PA10 STR Two Stage Trigger Lower Build Kit W/Overmolded Grip

    Rating:
    100%
    (2)
    $219.99
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  18. Harrington & Richardson M16A1 Lower Build Kit, Gray

    Harrington & Richardson M16A1 Lower Build Kit, Gray

    Rating:
    76%
    (5)
    $139.99
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  19. Tacfire Complete Pistol Build Kit for Semi-Auto Pistols, Black - SS-PK9MM-LPK-4

    Tacfire Complete Pistol Build Kit for Semi-Auto Pistols, Black - SS-PK9MM-LPK-4

    Regular Price $348.99 Special Price $316.99
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  20. 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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  21. Tacfire Complete Pistol Build Kit for Semi-Auto Pistols, Black - SS-PK556-LPK

    Tacfire Complete Pistol Build Kit for Semi-Auto Pistols, Black - SS-PK556-LPK

    Regular Price $451.99 Special Price $377.99
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  22. Tacfire Lower Parts Kit for Glock 17, Black/Silver - PK-GLK17

    Tacfire Lower Parts Kit for Glock 17, Black/Silver - PK-GLK17

    Regular Price $315.99 Special Price $283.99
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  23. 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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  24. Tacfire Lower Parts Kit for AR-15, Black - LPK02USA-B

    Tacfire Lower Parts Kit for AR-15, Black - LPK02USA-B

    Regular Price $65.99 Special Price $59.19
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