Showing 1 - 20 of 139 results
  1. Bushmaster AR-15 A3 Upper Receiver Assembly 450 Bushmaster 16" Barrel
    5.0 (19 Reviews)
    $659.99
    Available
  2. Bushmaster AR-15 A3 Upper Receiver Assembly 450 Bushmaster 20" Barrel
    4.9 (18 Reviews)
    $699.99
    Available
  3. DoubleStar AR-15 A3 Upper Receiver Assembly 300 AAC Blackout 16" 1 in 8" Twist HBAR Contour Barrel
    $509.99
    Available
  4. Alexander Arms AR-15 AWS A3 Upper Receiver Assembly 50 Beowulf 16.5" Barrel
    5.0 (6 Reviews)
    $1,139.99
    Available
  5. Bushmaster XM15 AR-15 A3 Upper Receiver Assembly 300 AAC Blackout 16" Barrel
    $739.99
    Available
  6. DPMS AR-15 Oracle A3 Upper Receiver Assembly 5.56x45mm NATO 16" Barrel Chrome Moly Matte Barrel
    4.7 (105 Reviews)
    $511.99
    Available
  7. Noveske AR-15 Rogue Hunter A3 Upper Receiver Assembly 300 AAC Blackout 16" Barrel
    5.0 (3 Reviews)
    $1,130.50
    Available
  8. Alexander Arms AR-15 Overwatch A3 Upper Receiver Assembly 6.5 Grendel 24" Barrel
    4.5 (28 Reviews)
    $849.99
    Available
  9. DoubleStar AR-15 Pistol A3 Upper Receiver Assembly 300 AAC Blackout 9" 1 in 8" Twist HBAR Contour Barrel
    $569.99
    Available
  10. Bushmaster AR-15 Patrolman M4 A3 Upper Receiver Assembly 5.56x45mm NATO 16" Barrel
    4.8 (23 Reviews)
    Sale
    $399.99
    Save $75.00 (16%)
    Available
  11. Adams Arms AR-15 Tactical Evo A3 Gas Piston Upper Receiver Assembly 5.56x45mm NATO 16" Barrel Mid Length
    4.2 (26 Reviews)
    $719.87
    Available
  12. Alexander Arms AR-15 Entry A3 Upper Receiver Assembly 50 Beowulf 16.5" Barrel
    4.6 (40 Reviews)
    $758.99
    Available
  13. Adams Arms AR-15 Base MOE A3 Gas Piston Upper Receiver Assembly 5.56x45mm NATO 16" Barrel
    4.3 (26 Reviews)
    $579.99
    Available
  14. Adams Arms AR-15 Pistol PDW Tactical Elite A3 Gas Piston Upper Receiver Assembly 5.56x45mm NATO 7.5" Barrel
    4.0 (9 Reviews)
    $699.60
    Available
  15. DPMS AR-15 A3 Conversion Upper Receiver Assembly 22 Long Rifle 16" Barrel
    4.6 (22 Reviews)
    $419.99
    Available
  16. Olympic Arms AR-15 A3 Upper Receiver Assembly 7.62x39mm 16" Barrel
    4.7 (27 Reviews)
    $575.99
    Available
  17. Daniel Defense AR-15 DDM4v11 Pro A3 Upper Receiver Assembly 5.56x45mm NATO 18" Barrel
    $1,215.00
    Available
  18. Colt AR-15 A3 Upper Receiver Assembly 5.56x45mm NATO 16" Barrel Flip Up Rear Sight
    5.0 (2 Reviews)
    $627.00
    Available
  19. Adams Arms AR-15 Pistol PDW Base A3 Gas Piston Upper Receiver Assembly 5.56x45mm NATO 7.5" Barrel
    4.6 (9 Reviews)
    $735.00
    Available
  20. DPMS AR-15 A3 Upper Receiver Assembly 5.56x45mm NATO 20" Barrel A2 Handguard
    4.7 (23 Reviews)
    $572.99
    Available
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