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    • AR Build Kits

    MCS Gearup carries a great selection of AR Build Kits. We have low cost kits starting under $79 and premium kits at competitive prices. Many of our AR build kits have everything you need to complete a fully functioning rifle except the lower receiver (and of course a magazine). They’re cost-effective ways to complete a customized rifle on your own time. Customize in your choice of caliber, barrel length, buffer weight, handguard style, gas system, furniture, and much more, in many different colors. We also carry bufferless builds and short build kits for AR pistols, all Backed by our satisfaction guarantee.

    • MCS Skeletonized 7.5" AR15 Complete Build Kit MCS Skeletonized 7.5" AR15 Complete Build Kit
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      Skeletonized 7.5" AR15 Complete Build Kit

      7.5" Skeletonized Pistol Complete Upper Build Kit Features: Skeletonized pistol brace BCA 4150 7.5″5.56 M4 BarrelBird cage MuzzleCarbine Length Gas TubeLow Profile .750 Gas Block7'' M-LOK Free Float Handguard Mil Spec Dust...

      MSRP: $569.99
      $479.99
      Add to Cart
    • SALE
      MCS AR15 LE Lower Build Kit
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      AR15 LE Lower Build Kit

      AR15 LE Lower Build KitKit includes: AR15 USA Made ButtStock AR15 Milspec Buffer Tube Kit MilSpec Lower Parts Kit With Fire Controls

      MSRP: $105.99
      Was: $105.99
      Now: $88.99
      Add to Cart
    • MCS Skeleton 16" AR15 Complete Build Kit MCS Skeleton 16" AR15 Complete Build Kit
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      Skeleton 16" AR15 Complete Build Kit

      16" Skeleton Complete Upper Build Kit Minus Lower Features: BCA 16'' M4 Contour 1:7 Twist Barrel Bird cage MuzzleCarbine Length Gas TubeLow Profile .750 Gas Block15'' M-LOK Free Float Handguard Mil Spec Dust CoverForward Assist Mil-spec...

      MSRP: $575.99
      $479.99
      Add to Cart
    • MCS Omega 16" AR15 Complete Build Kit MCS Omega 16" AR15 Complete Build Kit
      Quick view

      Omega 16" AR15 Complete Build Kit

      16" Omega Complete Upper Build Kit Minus Lower Features: BCA 16'' M4 Contour 1:7 Twist Barrel Bird cage MuzzleCarbine Length Gas TubeLow Profile .750 Gas Block15'' M-LOK Free Float Handguard Mil Spec Dust CoverForward Assist Mil-spec lower...

      MSRP: $570.99
      $479.99
      Add to Cart
    • MCS Alpha 16" AR15 Complete Build Kit MCS Alpha 16" AR15 Complete Build Kit
      Quick view

      Alpha 16" AR15 Complete Build Kit

      16" Alpha Complete Upper Build Kit Minus Lower Features: BCA 16'' M4 Contour 1:7 Twist Barrel Bird cage MuzzleCarbine Length Gas TubeLow Profile .750 Gas Block15'' M-LOK Free Float Handguard Mil Spec Dust CoverForward Assist Mil-spec lower...

      MSRP: $575.99
      $479.99
      Add to Cart
    • MCS Cobra 16" AR15 Complete Build Kit MCS Cobra 16" AR15 Complete Build Kit
      Quick view

      Cobra 16" AR15 Complete Build Kit

      16" Cobra Complete Upper Build Kit Minus Lower Features: BCA 16'' M4 Contour 1:7 Twist Barrel Bird cage MuzzleCarbine Length Gas TubeLow Profile .750 Gas Block15'' M-LOK Free Float Handguard Mil Spec Dust CoverForward Assist Mil-spec lower...

      MSRP: $575.99
      $479.99
      Add to Cart
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