Aero Precision M4E1 Complete Upper Receiver .223 Wylde Mid Barrel EM-15 HG, No BCG/Charging Handle, Gen 2, FDE Cerakote, 16In, APAR600252M9

Aero Precision M4E1 Enhanced Assembled Upper Receiver, FDE, APAR600202AC

Aero Precision M4E1 Complete Upper Receiver 5.56 Mid Barrel EM-12 HG, No BCG/Charging Handle, Anodized Black, 14.5In, APAR600231M5

Aero Precision M4E1 Assembled Upper Receiver, Thread, M-LOK Handguard, Anodized, Brown, APAR700222AC

Aero Precision Complete Upper Receiver W/Flash Hider, M4E1, .300 Barrel EM-9 HG, No BCG/Charging Handle, Gen 2, FDE Cerakote, 10In, APAR600222M4

Aero Precision Complete Upper Receiver, M4E1-T, 18In, 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M8

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver, 16in 5.56 Mid, SM15, Anodized Black, APAR712105M7

Aero Precision Complete Upper Receiver, M4E1-T, .223, 18In, Wylde Fluted Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M51

Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver, 18In, 1-8 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M42

Aero Precision Complete Upper Receiver, M4E1-T, 5.56x45mm NATO, 20In, Government, Rifle Length, 1 in 7, 1/2 X 28, 15In, A2 Flash Hider, Cerakote, FDE, APAR700715M48

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

Aero Precision M4E1-T Complete Upper, .223 Wylde, 16In, Mid Length, 1/8, 15in M-LOK AR15 ATLAS S-ONE, A2, Anodize Black, APAR700305M72

Aero Precision M4E1 Complete Upper Receiver, AR-15, 5.56x45mm NATO, 14.5 in Mid Length Barrel, 12 in Quad Rail Handguard, No BCG/CH, Magpul Cerakote, Flat Dark Earth, APAR640232Q5

Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 16In, 1-7 Twist, A2 Flash Hider, 5/8X24 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700705M14

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 20In, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M48

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 10,5In, M4 Barrel, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700702M2

Aero Precision M4E1 15in ATLAS R-ONE M-LOK Complete Upper, 16in 5.56 HBAR CMV Mid-Length Barrel, Anodized Black, Black, APAR700705M97

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 16In, M4 Barrel, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, FDE Cerakote, APAR700715M6

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 M4E1-T PRO CHF, M4, 5.56Mm, 13.9 Inch Complete Upper Receiver, Hanson, Mid Length, 1-7 Twist, A2 Birdcage, Anodized, OD Green, APAR700013D114

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

Aero Precision Lower Parts Kit, M4E1, Magpul MOE SL, Anodized Black, APRH100970

Aero Precision Lower Parts Kit, M4E1, Magpul MOE SL, No Fire Control Group/Trigger, Flat Dark Earth, APRH100987