Most Popular Upper Parts Kit for AR-15 / AR-10 / AR-9 Builds in 2026

AR-15AR-10AR-9

The top 13 most-used upper parts kit in 2026, ranked by how often they appear in builds tracked on AR15.Build. Updated nightly.

Upper parts kits supply the forward assist, dust cover, and the small components needed to complete a stripped upper receiver. Most brands use standard dimensions, but material quality and finish affect long-term durability. These are the kits that appear most in builds on AR15.Build.

  1. 1
    Aero Precision AR-15 Upper Receiver Parts Kit (APRH100270C)

    Aero Precision AR-15 Upper Receiver Parts Kit (APRH100270C)

    25 builds
    $20.99
  2. 2
    Anderson Manufacturing AR-15 Upper Receiver Parts Kit (G2-K641-0000)

    Anderson Manufacturing AR-15 Upper Receiver Parts Kit (G2-K641-0000)

    3 builds
    $14.99
  3. 3
    Aero Precision 5.56 Assembled Upper Build Kit w/ Atlas R-One M-LOK Handguard

    Aero Precision 5.56 Assembled Upper Build Kit w/ Atlas R-One M-LOK Handguard

    2 builds
    $462.29
  4. 4
    One Horse Upper Parts Kit Dust Cover & Forward Assist (AR-15) OH-UPK01

    One Horse Upper Parts Kit Dust Cover & Forward Assist (AR-15) OH-UPK01

    1 build
    $16.24
  5. 5

    Sons Of Liberty Gun Works Forward Assist Kit Stripes Mil-Spec AR-15 Upper

    1 build
    $15.19
  6. 6
    AIM Sports Inc Semi-Complete 5.56 AR Upper Parts Kit w/No BCG or Charging Handle

    AIM Sports Inc Semi-Complete 5.56 AR Upper Parts Kit w/No BCG or Charging Handle

    1 build
    $299.99
  7. 7
    Wilson Combat AR-15 Upper Receiver Parts Kit (TR-UPPERK)

    Wilson Combat AR-15 Upper Receiver Parts Kit (TR-UPPERK)

    1 build
    $29.22
  8. 8
    ABC Rifle Company AR-15 Rifle Build 5.56 NATO 16in Barrel 15in M-LOK Upper Kit

    ABC Rifle Company AR-15 Rifle Build 5.56 NATO 16in Barrel 15in M-LOK Upper Kit

    1 build
    $449.99
  9. 9
    Timber Creek AR Forward Assist Assembly Kits

    Timber Creek AR Forward Assist Assembly Kits

    1 build
    $24.99
  10. 10
    Tiger Rock AR-15 Ejection Port Cover & Dust Cover Assembly

    Tiger Rock AR-15 Ejection Port Cover & Dust Cover Assembly

    1 build
    $10.99
  11. 11
    RISE Armament Standard AR-15 Upper Parts Kit (7 Pieces)

    RISE Armament Standard AR-15 Upper Parts Kit (7 Pieces)

    1 build
    $26.24
  12. 12
    KAK Industry AR-15 Upper Completion Kit

    KAK Industry AR-15 Upper Completion Kit

    1 build
    $22.50
  13. 13
    Luth-AR A3 Upper Receiver Parts Kit (URPK-A3)

    Luth-AR A3 Upper Receiver Parts Kit (URPK-A3)

    1 build
    $13.43
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