The "J.A.C.K." Uppers

Just Another Carbine Kit Uppers

  • *NEW* 10.5" J.A.C.K. 5.56 Upper *NEW* 10.5" J.A.C.K. 5.56 Upper

    *NEW* 10.5" J.A.C.K. 5.56 Upper

    The J.A.C.K. (Just Another Carbine Kit) is designed to provide a solid foundation for your next build using tier 1 components that'll make sure your lead ends up where you mean it to. One of the most detrimental stages of an AR/M4 build is the upper...

    MSRP: $450.00
    $375.00
    Add to Cart
  • *NEW* 11.5" J.A.C.K. 5.56 Upper *NEW* 11.5" J.A.C.K. 5.56 Upper

    *NEW* 11.5" J.A.C.K. 5.56 Upper

    The J.A.C.K. (Just Another Carbine Kit) is designed to provide a solid foundation for your next build using tier 1 components that'll make sure your lead ends up where you mean it to. One of the most detrimental stages of an AR/M4 build is the upper...

    MSRP: $450.00
    $375.00
    Add to Cart
  • *NEW* 12.5" J.A.C.K. 5.56 Upper *NEW* 12.5" J.A.C.K. 5.56 Upper

    *NEW* 12.5" J.A.C.K. 5.56 Upper

    The J.A.C.K. (Just Another Carbine Kit) is designed to provide a solid foundation for your next build using tier 1 components that'll make sure your lead ends up where you mean it to. One of the most detrimental stages of an AR/M4 build is the upper...

    MSRP: $450.00
    $375.00
    Add to Cart
  • *NEW* 16" J.A.C.K. 5.56 M4 Upper *NEW* 16" J.A.C.K. 5.56 M4 Upper

    *NEW* 16" J.A.C.K. 5.56 M4 Upper

    The J.A.C.K. (Just Another Carbine Kit) is designed to provide a solid foundation for your next build using tier 1 components that'll make sure your lead ends up where you mean it to. One of the most detrimental stages of an AR/M4 build is the upper...

    MSRP: $450.00
    $375.00
    Add to Cart
  • *NEW* 14.5" J.A.C.K. 5.56 M4 Upper *NEW* 14.5" J.A.C.K. 5.56 M4 Upper

    *NEW* 14.5" J.A.C.K. 5.56 M4 Upper

    The J.A.C.K. (Just Another Carbine Kit) is designed to provide a solid foundation for your next build using tier 1 components that'll make sure your lead ends up where you mean it to. One of the most detrimental stages of an AR/M4 build is the upper...

    MSRP: $450.00
    $375.00
    Add to Cart