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AR-15/M4

Build your dream AR-15 with custom AR 15 parts available at MCS Gearup. Our range of items includes grips, magazines, sights, scopes and a whole lot of other AR 15 gun accessories. We also have a wide variety of options in accessories like slings, bags, etc. for your AR-15. 

 

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

    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
    Was: $479.99
    Now: $460.99
    Add to Cart
  • SALE
    AR15 LE Lower Build Kit

    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: $99.99
    Now: $78.99
    Add to Cart
  • SALE
    Skeleton 16" AR15 Complete Build Kit Skeleton 16" AR15 Complete Build Kit

    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
    Was: $475.99
    Now: $465.99
    Add to Cart
  • SALE
    Omega 16" AR15 Complete Build Kit Omega 16" AR15 Complete Build Kit

    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
    Was: $470.99
    Now: $460.99
    Add to Cart
  • SALE
    Alpha 16" AR15 Complete Build Kit Alpha 16" AR15 Complete Build Kit

    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
    Was: $475.99
    Now: $465.99
    Add to Cart
  • SALE
    Cobra 16" AR15 Complete Build Kit Cobra 16" AR15 Complete Build Kit

    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
    Was: $475.99
    Now: $465.99
    Add to Cart
  • SALE
    XBAR Xtended Bolt Assisted Release XBAR Xtended Bolt Assisted Release

    Xtended Bolt Assisted Release X-Bar

    Fired that last round and ready to load the next mag? With the XBAR, you can simply load the next mag without even moving your hand, slam that bolt shut and start running rounds again with the XBAR.  The XBAR Xtended Bolt Assisted Release wraps...

    MSRP: $29.99
    Was: $26.99
    Now: $24.99
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