Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver, 16in 5.56 Mid, SM15, FDE, APAR712115M7

Aero Precision M4E1 Assembled Upper Receiver, Thread, M-LOK Handguard, Anodized, OD Green, APAR700220AC

Aero Precision Complete Upper Receiver, M4E1, .300 Blackout Barrel EQ-12 HG, No BCG/Charging Handle, Gen 2, Anodized Black, 16In, APAR600231Q14

Aero Precision MOD4 15 18 Inch 223 Wylde PROOF 5.56x45mm M4E1-T Complete Upper Receiver, Black, APAR700001D111

Aero Precision M4E1 Complete Upper, .223 Wylde, 16In, Mid Length, 1/8, EM-15 Gen2, A2, FDE, APAR600252M72

Aero Precision Complete Upper Receiver, M4E1-T, SM12.7, 5.56x45mm NATO, 13.9In, Government, Mid Length, 1 in 7, 1/2 X 28, 12.7In, A2 Flash Hider, Cerakote, FDE, APAR700114M99

Aero Precision Complete Upper Receiver, M4E1-T, RM-15, 5.56x45mm NATO, 16In, Government, Mid Length, 1 in 7, 1/2 X 28, 15In, A2 Flash Hider, Anodized, OD Green, APAR700178M7

Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 8In, 1-7 Twist, 5/8X24 Thread, ATLAS R-ONE Handguard, FDE Cerakote, APAR700711M1

Aero Precision Complete Upper, M4E1-E, .223 Wylde, 16In, Mid-Length, EQ15 Anodized, Black, APAR600251Q72

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 14,5In, Mid-Length Barrel, 1-7 Twist, 1/2X28 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700704M5

Aero Precision M4E1 5.56 Enhanced Upper Receiver, No Forward Assist, Anodized Black, APAR612201AC

Aero Precision M4E1-E EM15 Complete Upper, 5.56 X 45, 16Inch, HBAR, Mid Length, 1-7 Twist, 1/2 X 28 Thread, Cerakote, FDE, APAR600294M97

Aero Precision M4E1 Enhanced Assembled Upper Receiver, FDE, APAR600202AC

Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 10In, 1-7 Twist, 5/8X24 Thread, ATLAS R-ONE Handguard, FDE Cerakote, APAR700712M4

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 18In, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M8

Aero Precision M4E1-T PRO CHF, M4, 5.56Mm, 16 Inch Complete Upper Receiver, Hanson, Mid Length, 1-7 Twist, A2 Birdcage, Anodized, OD Green, APAR700011D112

Aero Precision Lower Parts Kit, M4E1, Magpul MOE, No Fire Control Group/Trigger, Anodized Black, APRH100984

Aero Precision M4E1-T SM10.3 5 Complete Upper, 5.56 X 45, 12.5Inch, Government, Carbine, 1-7 Twist, 1/2 X 28 Thread, Cerakote, FDE, APAR700113M30

Aero Precision Lower Parts Kit, M4E1, Magpul MOE, Anodized Black, APRH100968

Aero Precision M4E1 5.56 NATO No Forward Assist Threaded Assembled Upper Receiver, FDE Cerakote, APAR712202AC

Aero Precision M4E1-T PRO 5.56X45, 16 in Upper Receiver, Hanson, Mid Length, 1-7 Twist, A2 Birdcage, OD Green, 11D112-1

Aero Precision M4E1-T 5.56X45 13.5 Inch MOD 4 Upper Receiver, Government, Mid Length, 1 in 7 Twist, A2 Bird Cage, Kodiak Brown, APAR700022D5

Aero Precision M4E1-T 5.56X45 15 Inch MOD 4 Upper Receiver, Government, Mid Length, 1 in 7 Twist, A2 Bird Cage, OD Green, APAR700011D7

Aero Precision M4E1-T 5.56X45 15 Inch MOD 4 Upper Receiver, Government, Mid Length, 1 in 7 Twist, A2 Bird Cage, Kodiak Brown, APAR700021D7

Aero Precision M4E1-T 5.56X45 12.7 Inch MOD 4 Upper Receiver, Government, Mid Length, 1 in 7 Twist, A2 Bird Cage, OD Green, APAR700013D99

Aero Precision M4E1-T 5.56X45 10.6 Inch MOD 4 Upper Receiver, Government, Carbine Length, 1 in 7 Twist, A2 Bird Cage, Black, APAR700005D29