Lower Build Kits

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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

    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

    Save 55%
    MSRP: $99.95
    $44.95
  • Sale!
    Omega AR-15 Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Omega AR-15 Lower Build Kit

    Save 42%
    MSRP: $119.95
    $69.95
  • NBS AR-15 Mil-Spec Carbine SOPMOD Lower Build Kit

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

    MSRP: $149.95
    $119.85
  • Sale!
    MFT BATTLELINK Mil-Spec Minimalist Lower Build Kit
    SALE ENDS: 00h 00m 00s

    MFT BATTLELINK Mil-Spec Minimalist Lower Build Kit

    Save 38%
    MSRP: $129.99
    $79.95
  • RAVE-140 Lower Parts Kit Minus Grip

    RAVE-140 Lower Parts Kit Minus Grip

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

    Carbine Lower Build Kit Configurator
  • Sale!
    Rogers Super-Stoc Mil-Spec Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Rogers Super-Stoc Mil-Spec Lower Build Kit

    Save 48%
    MSRP: $154.95
    $79.95
  • Dirty Bird AR-15 Carbine Hogue Lower Build Kit Minus FCG

    Dirty Bird AR-15 Carbine Hogue Lower Build Kit Minus FCG

    Save 5%
    MSRP: $179.95
    $149.32
  • NBS CQB 4 Position Micro AR-15 Lower Build Kit

    NBS CQB 4 Position Micro AR-15 Lower Build Kit

    Save 9%
    MSRP: $109.99
    $81.85
  • 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
  • BCMGUNFIGHTER MOD 0 Lower Build Kit

    BCMGUNFIGHTER MOD 0 Lower Build Kit

    Save 10%
    MSRP: $186.95
    $157.75
  • Magpul SL Lower Build Kit Minus FCG

    Magpul SL Lower Build Kit Minus FCG

    MSRP: $153.84
    $152.98
  • Magpul SL-K Lower Build Kit Minus FCG

    Magpul SL-K Lower Build Kit Minus FCG

    MSRP: $139.95
    $133.98
  • 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
  • Magpul PRS Lower Build Kit Minus FCG

    Magpul PRS Lower Build Kit Minus FCG

    Save 4%
    MSRP: $359.95
    $328.80
  • 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 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 PRS Lite Carbine Lower Build Kit
    SALE ENDS: 00h 00m 00s

    Magpul PRS Lite Carbine Lower Build Kit

    Save 31%
    MSRP: $259.99
    $179.95
  • 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