1. Alexander Arms AR-15 Overwatch A3 Upper Receiver Assembly 6.5 Grendel 24" Barrel
    Alexander Arms AR-15 Overwatch A3 Upper Receiver Assembly 6.5 Grend... 4.6 (48 Reviews)
    $849.99
    Available
  2. AR-Stoner AR-15 A3 Upper Receiver Assembly 6.5 Grendel 20" Barrel with 15" M-Lok Handguard
    AR-Stoner AR-15 A3 Upper Receiver Assembly 6.5 Grendel 20" Barrel w... 4.2 (5 Reviews)
    $449.99
    Temporarily unavailable
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