Lower Build Kits

Filter

Lower Build Kits

AR15Discounts has a great selection of Lower Build Kits. We have budget friendly kits starting under $80 and premium kits at competitive prices.

Explore our Curated Selection of Lower Build Kits from Top Tier Brands

Aero Precision , Magpul , Dirty Bird Industries , B5 Systems , NBS

  • Sale!
    Discount Mil-Spec Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Discount Mil-Spec Lower Build Kit

    (323)
    Save 55%
    MSRP: $109.95
    $49.95
  • Sale!
    Surplus AR-15 Mil-Spec Bare Bones Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Surplus AR-15 Mil-Spec Bare Bones Lower Build Kit

    (16)
    Save 55%
    MSRP: $99.95
    $44.95
  • Sale!
    NBS AR-15 Mil-Spec Carbine SOPMOD Lower Build Kit
    SALE ENDS: 00h 00m 00s

    NBS AR-15 Mil-Spec Carbine SOPMOD Lower Build Kit

    (4)
    Save 53%
    MSRP: $149.95
    $69.95
  • RAVE-140 Lower Parts Kit Minus Grip

    RAVE-140 Lower Parts Kit Minus Grip

    (40)
    Save 25%
    MSRP: $179.99
    $117.90
  • Carbine Lower Build Kit Configurator

    Carbine Lower Build Kit Configurator

    (19)
  • Sale!
    Rogers Super-Stoc Mil-Spec Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Rogers Super-Stoc Mil-Spec Lower Build Kit

    (7)
    Save 52%
    MSRP: $154.95
    $74.95
  • Magpul MOE Lower Build Kit - Black

    Magpul MOE Lower Build Kit – Black

    (21)
    MSRP: $169.95
    $165.79
  • Sale!
    NBS CQB 4 Position Micro AR-15 Lower Build Kit
    SALE ENDS: 00h 00m 00s

    NBS CQB 4 Position Micro AR-15 Lower Build Kit

    (1)
    Save 45%
    MSRP: $109.99
    $59.95
  • Sale!
    Trinity Force Breach Blade Pistol Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Trinity Force Breach Blade Pistol Lower Build Kit

    Save 36%
    MSRP: $109.95
    $69.95
  • Black Fallout Lower Build Kit

    Black Fallout Lower Build Kit

    (13)
    MSRP: $239.95
    $236.58
  • BCMGUNFIGHTER MOD 0 Lower Build Kit

    BCMGUNFIGHTER MOD 0 Lower Build Kit

    (7)
    Save 9%
    MSRP: $186.95
    $157.75
  • Dirty Bird SBA3 Lower Build Kit

    Dirty Bird SBA3 Lower Build Kit

    (1)
    MSRP: $219.95
    $179.95
  • SB Tactical SBA5 Pistol Brace Lower Build Kit

    SB Tactical SBA5 Pistol Brace Lower Build Kit

    (1)
    $189.89
  • Sale!
    Magpul SL Lower Build Kit Minus FCG
    SALE ENDS: 00h 00m 00s

    Magpul SL Lower Build Kit Minus FCG

    (2)
    Save 29%
    MSRP: $153.84
    $109.95
  • Sale!
    Magpul MOE SL Carbine Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Magpul MOE SL Carbine Lower Build Kit

    Save 30%
    MSRP: $199.95
    $139.95
  • Sale!
    Magpul SL-K Lower Build Kit Minus FCG
    SALE ENDS: 00h 00m 00s

    Magpul SL-K Lower Build Kit Minus FCG

    (2)
    Save 29%
    MSRP: $139.95
    $99.95
  • Sale!
    Magpul CTR Carbine Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Magpul CTR Carbine Lower Build Kit

    Save 30%
    MSRP: $199.95
    $139.95
  • Sale!
    Magpul PRS Lower Build Kit Minus FCG
    SALE ENDS: 00h 00m 00s

    Magpul PRS Lower Build Kit Minus FCG

    (1)
    Save 22%
    MSRP: $359.95
    $279.95
  • Dirty Bird Magpul MOE Fixed 2-Stage Lower Build Kit

    Dirty Bird Magpul MOE Fixed 2-Stage Lower Build Kit

    Save 30%
    MSRP: $229.95
    $189.75
  • Sale!
    Magpul MOE SL-M Carbine Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Magpul MOE SL-M Carbine Lower Build Kit

    Save 33%
    MSRP: $179.95
    $119.95
  • Sale!
    Magpul STR Carbine Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Magpul STR Carbine Lower Build Kit

    Save 35%
    MSRP: $229.95
    $149.95
  • Sale!
    Magpul MOE SL-S Carbine Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Magpul MOE SL-S Carbine Lower Build Kit

    Save 30%
    MSRP: $229.95
    $159.95
    • Ray ID: a2c51268df6c25cc-IAD