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Rock River Arms
Rock River Arms Completed Upper Receiver, A4 9MM Luger, 10.5 Inch Barrel, 1-10 Twist, 1/2-36 Thread, R4 Handguard, A2 Flash Hider, Black, 9MM0364B
Upper Receiver$480
Aero Precision
Aero Precision EPC-9 Enhanced Complete Upper Receiver, 11in 9mm, EM-9.3in Handguard, Anodized Black, APAR620275M86
Upper Receiver$480
Lead & Steel
Lead & Steel JAG 5.56mm 16in Upper Receiver Group, Mid Length, 1-7 Twist, Flash Hider, Earth, 120723
Upper Receiver$480
Aero Precision
Aero Precision Complete Upper Receiver, M4E1, 16in, 5.56 Mid Pencil Barrel, EM-15 HG Gen 2, FDE Cerakote, APAR640252M39
Upper Receiver$480
Aero Precision
Aero Precision AR15 Complete Upper, 16in 5.56 M4 Carbine Barrel w/ Pinned FSB, M4 Handguard ,Includes BCG & CH, Anodized Black, APAR505721
Upper Receiver$480
Aero Precision
Aero Precision Complete Upper Receiver, M4E1, .300 Blackout Barrel EQ-15 HG, No BCG/Charging Handle, Gen 2, FDE Cerakote, 16in, APAR600252Q14
Upper Receiver$480